DuQuesne's first act upon gaining the privacy of his own cabin was to open the leather bag presented to him by the Karfedix. He expected to find it filled with rare metals, with perhaps some jewels, instead of which the only metal present was a heavily-insulated tube containing a full pound of metallic radium. The least valuable items in the bag were scores of diamonds, rubies, and emeralds of enormous size and of flawless perfection. Merely ornamental glass upon Osnome, Dunark knew that they were priceless upon Earth, and had acted accordingly. To this great wealth of known gems, he had added a rich and varied assortment of the rare and strange jewels peculiar to his own world, the faidon alone being omitted from the collection. DuQuesne's habitual calmness of mind almost deserted him as he classified the contents of the bag.

The radium alone was worth millions of dollars, and the scientist in him exulted that at last his brother scientists should have ample supplies of that priceless metal with which to work, even while he was rejoicing in the price he would exact for it. He took out the familiar jewels, estimating their value as he counted them—a staggering total. The bag was still half full of the strange gems, some of them glowing like miniature lamps in the dark depths, and he made no effort to appraise them. He knew that once any competent jeweler had compared their cold, hard, scintillating beauty with that of any Earthly gems, he could demand his own price.

"At last," he breathed to himself, "I will be what I have always longed to be—a money power. Now I can cut loose from that gang of crooks and go my own way."

He replaced the gems and the tube of radium in the bag, which he stowed away in one of his capacious pockets, and made his way to the galley.

The return voyage through space was uneventful, the Skylark constantly maintaining the same velocity with which she had started out. Several times, as the days wore on, she came within the zone of attraction of various gigantic suns, but the pilot had learned his lesson. He kept a vigilant eye upon the bar, and at the first sign of a deviation from the perpendicular he steered away, far from the source of the attraction. Not content with these precautions, the man at the board would, from time to time, shut off the power, to make sure that the space-car was not falling toward a body directly in its line of flight.

When half the distance had been covered, the bar was reversed, the travelers holding an impromptu ceremony as the great vessel spun around its center through an angle of one hundred and eighty degrees. A few days later the observers began to recognize some of the fixed stars in familiar constellations and knew that the yellowish-white star directly in their line of flight was the sun of their own solar system. After a time they saw that their course, instead of being directly toward that rapidly-brightening star, was bearing upon a barely visible star a little to one side of it. Pointing their most powerful telescope toward that point of light, Crane made out a planet, half of its disk shining brightly. The girls hastened to peer through the telescope, and they grew excited as they made out the familiar outlines of the continents and oceans upon the lighted portion of the disk.

It was not long until these outlines were plainly visible to the unaided vision. The Earth appeared as a great, softly shining, greenish half-moon, with parts of its surface obscured by fleecy wisps of cloud, and with its two gleaming ice-caps making of its poles two brilliant areas of white. The returning wanderers stared at their own world with their hearts in their throats as Crane, who was at the board, increased the retarding force sufficiently to assure himself that they would not be traveling too fast to land upon the Earth.

After Dorothy and Margaret had gone to prepare a meal, DuQuesne turned to Seaton.

"Have you gentlemen decided what you intend to do with me?"

"No. We haven't discussed it yet. I can't make up my own mind what I want to do to you, except that I sure would like to get you inside a square ring with four-ounce gloves on. You have been of too much real assistance on this trip for us to see you hanged, as you deserve. On the other hand, you are altogether too much of a thorough-going scoundrel for us to let you go free. You see the fix we are in. What would you suggest?"

"Nothing," replied DuQuesne calmly. "As I am in no danger whatever of hanging, nothing you can say on that score affects me in the least. As for freeing me, you may do as you please—it makes no difference to me, one way or the other, as no jail can hold me for a day. I can say, however, that while I have made a fortune on this trip, so that I do not have to associate further with Steel unless it is to my interest to do so, I may nevertheless find it desirable at some future time to establish a monopoly of X. That would, of course, necessitate the death of yourself and Crane. In that event, or in case any other difference should arise between us, this whole affair will be as though it had never existed. It will have no weight either way, whether or not you try to hang me."

"Go as far as you like," Seaton answered cheerfully. "If we're not a match for you and your gang, on foot or in the air, in body or in mind, we'll deserve whatever we get. We can outrun you, outjump you, throw you down, or lick you; we can run faster, hit harder, dive deeper, and come up dryer, than you can. We'll play any game you want to deal, whenever you want to deal it; for fun, money, chalk, or marbles."

His brow darkened in anger as a thought struck him, and the steady gray eyes bored into the unflinching black ones as he continued, with no trace of his former levity in his voice:

"But listen to this. Anything goes as far as Martin and I personally are concerned. But I want you to know that I could be arrested for what I think of you as a man; and if any of your little schemes touch Dottie or Peggy in any way, shape or form, I'll kill you as I would a snake—or rather, I'll take you apart as I would any other piece of scientific apparatus. This isn't a threat, it's a promise. Get me?"

"Perfectly. Good-night."

For many hours the Earth had been obscured by clouds, so that the pilot had only a general idea of what part of the world was beneath them, but as they dropped rapidly downward into the twilight zone, the clouds parted and they saw that they were directly over the Panama Canal. Seaton allowed the Skylark to fall to within ten miles of the ground, when he stopped so that Martin could get his bearings and calculate the course to Washington, which would be in total darkness before their arrival.

DuQuesne had retired, cold and reticent as usual. Glancing quickly about his cabin to make sure that he had overlooked nothing he could take with him, he opened a locker, exposing to view four suits which he had made in his spare time, each adapted to a particular method of escape from the Skylark. The one he selected was of heavy canvas, braced with steel netting, equipped with helmet and air-tanks, and attached to a strong, heavy parachute. He put it on, tested all its parts, and made his way unobserved to one of the doors in the lower part of the vessel. Thus, when the chance for escape came, he was ready for it. As the Skylark paused over the Isthmus, his lips parted in a sardonic smile. He opened the door and stepped out into the air, closing the door behind him as he fell. The neutral color of the parachute was lost in the gathering twilight a few seconds after he left the vessel.

The course laid, Seaton turned almost due north and the Skylark tore through the air. After a short time, when half the ground had been covered, Seaton spoke suddenly.

"Forgot about DuQuesne, Mart. We'd better iron him, hadn't we? Then we'll decide whether we want to keep him or turn him loose."

"I will go fetch him," replied Crane, and turned to the stairs.

He returned shortly, with the news of the flight of the captive.

"Hm ... he must have made himself a parachute. I didn't think even he would tackle a sixty-thousand-foot drop. I'll tell the world that he sure has established a record. I can't say I'm sorry that he got away, though. We can get him again any time we want him, anyway, as that little object-compass in my drawer is still looking right at him," said Seaton.

"I think he earned his liberty," declared Dorothy, stoutly, and Margaret added:

"He deserves to be shot, but I'm glad he's gone. He gives me the shivers."

At the end of the calculated time they saw the lights of a large city beneath them, and Crane's fingers clenched upon Seaton's arm as he pointed downward. There were the landing-lights of Crane Field, seven peculiarly-arranged searchlights throwing their mighty beams upward into the night.

"Nine weeks, Dick," he said, unsteadily, "and Shiro would have kept them burning nine years if necessary."

The Skylark dropped easily to the ground in front of the testing shed and the wanderers leaped out, to be greeted by the half-hysterical Jap. Shiro's ready vocabulary of peculiar but sonorous words failed him completely, and he bent himself double in a bow, his yellow face wreathed in the widest possible smile. Crane, one arm around his wife, seized Shiro's hand and wrung it in silence. Seaton swept Dorothy off her feet, pressing her slender form against his powerful body. Her arms tightened about his neck as they kissed each other fervently and he whispered in her ear:

"Sweetheart wife, isn't it great to be back on our good old Earth again?"

THE END

The pulsating air and the chattering sounders were giving the same dire warning, the alarm extraordinary of invasion, of imminent and catastrophic danger from the air.

"Don't try to reach the palace. Everyone on the ground will have time enough to hide in the deep, arenak-protected pits beneath the buildings, and you would be killed by the invaders long before you could reach the palace. If we can repel the enemy and keep them from landing, the women will be perfectly safe, even though the whole city is destroyed. If they effect a landing we are lost."

"They'll not land, then," Seaton answered grimly, as he sprang into the Skylark and took his place at the board. As Crane took out his wireless, Seaton cautioned him.

"Send in English, and tell the girls not to answer, as these devils can locate the calls within a foot and will be able to attack the right spot. Just tell them we're safe in the Skylark. Tell them to sit tight while we wipe out this gang that is coming, and that we'll call them, once in a while, when we have time, during the battle."

Before Crane had finished sending the message the crescendo whine of enormous propellers was heard. Simultaneously there was a deafening concussion and one entire wing of the palace disappeared in a cloud of dust, in the midst of which could be discerned a few flying fragments. The air was filled with Mardonalian warships. They were huge vessels, each mounting hundreds of guns, and the rain of high-explosive shells was rapidly reducing the great city to a wide-spread heap of debris.

Seaton's hand was upon the lever which would hurl the Skylark upward into the fray. Crane and DuQuesne, each hard of eye and grim of jaw, were stationed at their machine-guns.

"Something's up!" exclaimed Seaton. "Look at the Kondal!"

Something had happened indeed. Dunark sat at the board, his hand upon the power lever, and each of his crew was in place, grasping his weapon, but every man was writhing in agony, unable to control his movements. As they stared, momentarily spellbound, the entire crew ceased their agonized struggles and hung, apparently lifeless, from their supports.

"They've got to 'em some way—let's go!" yelled Seaton.

As his hand tightened upon the lever, a succession of shells burst upon the dock, wrecking it completely, all three men fancied that the world had come to an end as the stream of high explosive was directed against their vessel. But the four-foot shell of arenak was impregnable, and Seaton shot the Skylark upward into the midst of the enemy fleet. The two gunners fired as fast as they could sight their weapons, and with each shot one of the great warships was blown into fragments. The Mardonalians then concentrated the fire of their entire fleet upon their tiny opponent.

From every point of the compass, from above and below, the enemy gunners directed streams of shells against the dodging vessel. The noise was more than deafening, it was one continuous, shattering explosion, and the Earth-men were surrounded by such a blaze of fire from the exploding shells that they could not see the enemy vessels. Seaton sought to dodge the shells by a long dive toward one side, only to find that dozens of new opponents had been launched against them—the deadly airplane-torpedoes of Osnome. Steered by wireless and carrying no crews, they were simply winged bombs carrying thousands of pounds of terrific electrical explosive—enough to kill the men inside the vessel by the concussion of the explosion, even should the arenak armor be strong enough to withstand the blow. Though much faster than the Osnomian vessels, they were slow beside the Skylark, and Seaton could have dodged a few of them with ease. As he dodged, however, they followed relentlessly, and in spite of those which were blown up by the gunners, their number constantly increased until Seaton thought of the repellers.

"'Nobody Holme' is right!" he exclaimed, as he threw on the power actuating the copper bands which encircled the hull in all directions. Instantly the torpedoes were hurled backward, exploding as the force struck them, and even the shells were ineffective, exploding harmlessly, as they encountered the zone of force. The noise of the awful detonations lessened markedly.

"Why the silence, I wonder?" asked Seaton, while the futile shells of the enemy continued to waste their force some hundreds of feet distant from their goal, and while Crane and DuQuesne were methodically destroying the huge vessels as fast as they could aim and fire. At every report one of the monster warships disappeared—its shattered fragments and the bodies of its crew hurtling to the ground. His voice could not be heard in even the lessened tumult, but he continued:

"It must be that our repellers have set up a partial vacuum by repelling even the air!"

Suddenly the shelling ceased and the Skylark was enveloped by a blinding glare from hundreds of great reflectors; an intense, searching, bluish-violet light that burned the flesh and seared through eyelids and eyeballs into the very brain.

"Ultra-violet!" yelled Seaton at the first glimpse of the light, as he threw on the power. "Shut your eyes! Turn your heads down!"

Out in space, far beyond reach of the deadly rays, the men held a short conference, then donned heavy leather-and-canvas suits, which they smeared liberally with thick red paint, and replaced the plain glasses of their helmets with heavy lenses of deep ruby glass.

"This'll stop any ultra-violet ray ever produced," exulted Seaton, as he again threw the vessel into the Mardonalian fleet. A score of the great vessels met their fate before the Skylark was located, and, although the terrible rays were again focused upon the intruder in all their intensity, the carnage continued.

In a few minutes, however, the men heard, or rather felt, a low, intense vibration, like a silent wave of sound—a vibration which smote upon the eardrums as no possible sound could smite, a vibration which racked the joints and tortured the nerves as though the whole body were disintegrating. So sudden and terrible was the effect that Seaton uttered an involuntary yelp of surprise and pain as he once more fled into the safety of space.

"What the devil was that?" demanded DuQuesne. "Was it infra-sound? I didn't suppose such waves could be produced."

"Infra-sound is right. They produce most anything here," replied Seaton, and Crane added:

"Well, about three fur suits apiece, with cotton in our ears, ought to kill any wave propagated through air."

The fur suits were donned forthwith, Seaton whispering in Crane's ear:

"I've found out something else, too. The repellers repel even the air. I'm going to shoot enough juice through them to set up a perfect vacuum outside. That'll kill those air-waves."

Scarcely were they back within range of the fleet when DuQuesne, reaching for his gun to fire the first shot, leaped backward with a yell.

"Beat it!"

Once more at a safe distance, DuQuesne explained.

"It's lucky I'm so used to handling hot stuff that from force of habit I never make close contact with anything at the first touch. That gun carried thousands of volts, with lots of amperage behind them, and if I had had a good hold on it I couldn't have let go. We'll block that game quick enough, though. Thick, dry gloves covered with rubber are all that is necessary. It's a good thing for all of us that you have those fancy condensite handles on your levers, Seaton."

"That was how they got Dunark, undoubtedly," said Crane, as he sent a brief message to the girls, assuring them that all was well, as he had been doing at every respite. "But why were we not overcome at the same time?"

"They must have had the current tuned to iridium, and had to experiment until they found the right wave for steel," Seaton explained.

"I should think our bar would have exploded, with all that current. They must have hit the copper range, too?"

Seaton frowned in thought before he answered.

"Maybe because it's induced current, and not a steady battery impulse. Anyway, it didn't. Let's go!"

"Just a minute," put in Crane. "What are they going to do next, Dick?"

"Search me. I'm not used to my new Osnomian mind yet. I recognize things all right after they happen, but I can't seem to figure ahead—it's like a dimly-remembered something that flashes up as soon as mentioned. I get too many and too new ideas at once. I know, though, that the Osnomians have defenses against all these things except this last stunt of the charged guns. That must be the new one that Mardonale stole from Kondal. The defenses are, however, purely Osnomian in character and material. As we haven't got the stuff to set them up as the Osnomians do, we'll have to do it our own way. We may be able to dope out the next one, though. Let's see, what have they given us so far?"

"We've got to hand it to them," responded DuQuesne, admiringly. "They're giving us the whole range of wave-lengths, one at a time. They've given us light, both ultra-violet and visible, sound, infra-sound, and electricity—I don't know what's left unless they give us a new kind of X-rays, or Hertzian, or infra-red heat waves, or...."

"That's it, heat!" exclaimed Seaton. They produce heat by means of powerful wave-generators and by setting up heavy induced currents in the armor. They can melt arenak that way."

"Do you suppose we can handle the heat with our refrigerators?" asked Crane.

"Probably. We have a lot of power, and the new arenak cylinders of our compressors will stand anything. The only trouble will be in cooling the condensers. We'll run as long as we have any water in our tanks, then go dive into the ocean to cool off. We'll try it a whirl, anyway."

Soon the Skylark was again dealing out death and destruction in the thick of the enemy vessels, who again turned from the devastation of the helpless city to destroy this troublesome antagonist. But in spite of the utmost efforts of light-waves, sound-waves, and high-tension electricity, the space-car continued to take its terrible toll. As Seaton had foretold, the armor of the Skylark began to grow hot, and he turned on the full power of the refrigerating system. In spite of the cooling apparatus, however, the outer walls finally began to glow redly, and, although the interior was comfortably cool, the ends of the rifle-barrels, which were set flush with the surface of the revolving arenak globes which held them, softened, rendering the guns useless. The copper repellers melted and dripped off in flaming balls of molten metal, so that shells once more began to crash against the armor. DuQuesne, with no thought of quitting apparent in voice or manner, said calmly:

"Well, it looks as though they had us stopped for a few minutes. Let's go back into space and dope out something else."

Seaton, thinking intensely, saw a vast fleet of enemy reinforcements approaching, and at the same time received a wireless call directed to Dunark. It was from the grand fleet of Kondal, hastening from the bordering ocean to the defense of the city. Using Dunark's private code, Seaton told the Karbix, who was in charge of the fleet, that the enemy had a new invention which would wipe them out utterly without a chance to fight, and that he and his vessel were in control of the situation; and ordered him to see that no Kondalian ship came within battle range of a Mardonalian. He then turned to Crane and DuQuesne, his face grim and his fighting jaw set.

"I've got it doped right now. Give the Lark speed enough and she's some bullet herself. We've got four feet of arenak, they've got only an inch, and arenak doesn't even begin to soften until far above a blinding white temperature. Strap yourselves in solid, for it's going to be a rough party from now on."

They buckled their belts firmly, and Seaton, holding the bar toward their nearest antagonist, applied twenty notches of power. The Skylark darted forward and crashed completely through the great airship. Torn wide open by the forty-foot projectile, its engines wrecked and its helicopter-screws and propellers completely disabled, the helpless hulk plunged through two miles of empty air, a mass of wreckage.

Darting hither and thither, the space-car tore through vessel after vessel of the Mardonalian fleet. She was an embodied thunderbolt; a huge, irresistible, indestructible projectile, directed by a keen brain inside it—the brain of Richard Seaton, roused to his highest fighting pitch and fighting for everything that man holds dear. Tortured by the terrible silent waves, which, now that the protecting vacuum had been destroyed, were only partially stopped by the fur suits; shaken and battered by the terrific impacts and the even greater shocks occurring every second as the direction of the vessel was changed; made sick and dizzy by the nauseating swings and lurches as the Skylark spun about the central chamber; Seaton's wonderful physique and his nerves of steel stood him in good stead in this, the supreme battle of his life, as with teeth tight-locked and eyes gray and hard as the fracture of high-carbon steel, he urged the Skylark on to greater and greater efforts.

Though it was impossible for the eye to follow the flight of the space-car, the mechanical sighting devices of the Mardonalian vessels kept her in as perfect focus as though she were stationary, and the great generators continued to hurl into her the full power of their death-dealing waves. The enemy guns were still spitting forth their streams of high-explosive shells, but unlike the waves, the shells moved so slowly compared to their target that only a few found their mark, and many of the vessels fell to the ground, riddled by the shells of their sister-ships.

With anxious eyes Seaton watched the hull of his animated cannon-ball change in color. From dull red it became cherry, and as the cherry red gave place to bright red heat, Seaton threw even more power into the bar as he muttered through his set teeth:

"Well, Seaton, old top, you've got to cut out this loafing on the job and get busy!"

In spite of his utmost exertions and in spite of the powerful ammonia plant, now exerting its full capacity, but sadly handicapped by the fact that its cooling-water was now boiling, Seaton saw the arenak shell continue to heat. The bright red was succeeded by orange, which slowly changed, first to yellow, then to light yellow, and finally to a dazzling white; through which, with the aid of his heavy red lenses, he could still see the enemy ships. After a time he noted that the color had gone down to yellow and he thrilled with exultation, knowing that he had so reduced the numbers of the enemy fleet that their wave-generators could no longer overcome his refrigerators. After a few minutes more of the awful carnage there remained only a small fraction of the proud fleet which, thousands strong, had invaded Kondal—a remnant that sought safety in flight. But even in flight, they still fought with all their weapons, and the streams of bombs dropped from their keel-batteries upon the country beneath marked the path of their retreat with a wide swath of destruction. Half inclined to let the few remaining vessels escape, Seaton's mind changed instantly as he saw the bombs spreading devastation upon the countryside, and not until the last of the Mardonalian vessels had been destroyed did he drop the Skylark into the area of ruins which had once been the palace grounds, beside the Kondal, which was still lying as it had fallen.

After several attempts to steady their whirling senses, the three men finally were able to walk, and, opening a door, they leaped out through the opening in the still glowing wall. Seaton's first act was to wireless the news to Dorothy, who replied that they were coming as fast as they could. The men then removed their helmets, revealing faces pale and drawn, and turned to the helpless space-car.

"There's no way of getting into this thing from the outside...." Seaton began, when he saw that the Kofedix and his party were beginning to revive. Soon Dunark opened the door and stumbled out.

"I have to thank you for more than my life this time," he said, his voice shaken by uncontrollable emotion as he grasped the hands of all three men. "Though unable to move, I was conscious and saw all that happened—you kept them so busy that they didn't have a chance to give us enough to kill us outright. You have saved the lives of millions of our nation and have saved Kondal itself from annihilation."

"Oh, it's not that bad," answered Seaton, uncomfortably. "Both nations have been invaded before."

"Yes—once when we developed the ultra-violet ray, once when Mardonale perfected the machine for producing the silent sound-wave, and again when we harnessed the heat-wave. But this would have been the most complete disaster in history. The other inventions were not so deadly as was this one, and there were terrible battles, from which the victors emerged so crippled that they could not completely exterminate the vanquished, who were able to re-establish themselves in the course of time. If it had not been for you, this would have been the end, as not a Kondalian soldier could move—any person touching iridium was helpless and would have been killed."

He ceased speaking and saluted as the Karfedix and his party rounded a heap of boulders. Dorothy and Margaret screamed in unison as they saw the haggard faces of their husbands, and saw their suits, dripping with a thick substance which they knew to be red, in spite of its purplish-black color. Seaton dodged nimbly as Dorothy sought to take him in her arms, and tore off his suit.

"Nothing but red paint to stop their light-rays," he reassured her as he lifted her clear from the ground in a soul-satisfying embrace. Out of the corner of his eye he saw the Kondalians staring in open-mouthed amazement at the Skylark. Wheeling swiftly, he laughed as he saw a gigantic ball of frost and snow! Again donning his fur suit, he shut off the refrigerators and returned to his party, where the Karfedix gave him thanks in measured terms. As he fell silent, Dunark added:

"Thanks to you, the Mardonalian forces, instead of wiping us out, are themselves destroyed, while only a handful of our vessels have been lost, since the grand fleet could not arrive until the battle was over, and since the vessels that would have thrown themselves away were saved by your orders, which I heard. Thanks to you, we are not even crippled, though our capital is destroyed and the lives of some unfortunates, who could not reach the pits in time, have probably been lost.

"Thanks to you," he continued in a ringing voice, "and to the salt and the new source of power you have given us, Mardonale shall now be destroyed utterly!"

After sending out ships to relieve the suffering of the few wounded and the many homeless, Dunark summoned a corps of mechanics, who banded on new repellers and repaired the fused barrels of the machine-guns, all that was necessary to restore the Skylark to perfect condition.

Facing the party from Earth, the Karfedix stood in the ruins of his magnificent palace. Back of him were the nobles of Kondal, and still further back, in order of rank, stood a multitude of people.

"Is it permitted, oh noble Karfedo, that I reward your captive for his share in the victory?" he asked.

"It is," acquiesced Seaton and Crane, and Roban stepped up to DuQuesne and placed in his hand a weighty leather bag. He then fastened about his left wrist the Order of Kondal, the highest order of the nation.

He then clasped about Crane's wrist a heavily-jeweled, peculiarly-ornamented disk wrought of a deep ruby-red metal, supported by a heavy bracelet of the same material, the most precious metal of Osnome. At sight of the disk the nobles saluted and Seaton barely concealed a start of surprise, for it bore the royal emblem and delegated to its bearer power second only to that of the Karfedix himself.

"I bestow upon you this symbol, Karfedix Crane, in recognition of what you have this day done for Kondal. Wherever you may be upon Kondalian Osnome, which from this day henceforth shall be all Osnome, you have power as my personal representative, as my eldest son."

He drew forth a second bracelet, similar to the first except that it bore seven disks, each differently designed, which he snapped upon Seaton's wrist as the nobles knelt and the people back of them threw themselves upon their faces.

"No language spoken by man possesses words sufficiently weighty to express our indebtedness to you, Karfedix Seaton, our guest and our savior. The First Cause has willed that you should be the instrument through which Kondal is this day made supreme upon Osnome.

In small and partial recognition of that instrumentality, I bestow upon you these symbols, which proclaim you our overlord, the ultimate authority of Osnome.

While this is not the way in which I had thought to bid you farewell, the obligations which you have heaped upon us render all smaller things insignificant. When you return, as I hope and trust you soon will, the city shall be built anew and we can welcome you as befits your station."

Lifting both arms above his head he continued:

"May the great First Cause smile upon you in all your endeavors until you solve the Mystery: may your descendants soon reach the Ultimate Goal. Goodbye."

Seaton uttered a few heartfelt words in response and the party stepped backward toward the Skylark. As they reached the vessel the standing Karfedix and the ranks of kneeling nobles snapped into the double salute—truly a rare demonstration in Kondal.

"What'll we do now?" whispered Seaton.

"Bow, of course," answered Dorothy.

They bowed, deeply and slowly, and entered their vessel. As the Skylark shot into the air with the greatest acceleration that would permit its passengers to move about, the grand fleet of Kondalian warship fired a deafening salute.

It had been planned before the start that each person was to work sixteen hours out of the twenty-four. Seaton was to drive the vessel during the first two eight-hour periods of each day. Crane was to observe the stars during the second and to drive during the third. DuQuesne was to act as observer during the first and third periods. Margaret had volunteered to assist the observer in taking his notes during her waking hours, and Dorothy appointed herself cook and household manager.

As soon as the Skylark had left Osnome, Crane told DuQuesne that he and his wife would work in the observation room until four o'clock in the afternoon, at which time the prearranged system of relief would begin, and DuQuesne retired to his room.

Crane and Margaret made their way to the darkened room which housed the instruments and seated themselves, watching intently and making no effort to conceal their emotion as first the persons beneath them, then the giant war-vessels, and finally the ruined city itself, were lost to view. Osnome slowly assumed the proportions of a large moon, grew smaller, and as it disappeared Crane began to take notes. For a few hours the seventeen suns of this strange solar system shone upon the flying space-car, after which they assumed the aspect of a widely-separated cluster of enormous stars, slowly growing smaller and smaller and shrinking closer and closer together.

At four o'clock in the afternoon, Washington time, DuQuesne relieved Crane, who made his way to the engine room.

"It is time to change shifts, Dick. You have not had your sixteen hours, but everything will be regular from now on. You two had better get some rest."

"All right," replied Seaton, as he relinquished the controls to Crane, and after bidding the new helmsman goodnight he and Dorothy went below to their cabin.

Standing at a window with their arms around each other they stared down with misty eyes at the very faint green star, which was rapidly decreasing in brilliance as the Skylark increased its already inconceivable velocity. Finally, as it disappeared altogether, Seaton turned to his wife and tenderly, lovingly, took her in his arms.

"Littlest Girl.... Sweetheart...." he whispered, and paused, overcome by the intensity of his feelings.

"I know, husband mine," she answered, while tears dimmed her glorious eyes. "It is too deep. With nothing but words, we can't say a single thing."

"These jewels rather puzzle me, Dick. What are they?" asked Martin, as the four assembled, waiting for the first meal. As he spoke he held up his third finger, upon which gleamed the royal jewel of Osnome in its splendid Belcher mounting of arenak as transparent as the jewel itself and having the same intense blue color. "I know the name, 'faidon,' but that's all I seem to know."

"That's about all that anybody knows about them. It is a naturally-occurring, hundred-faceted crystal, just as you see it there—deep blue, perfectly transparent, intensely refractive, and constantly emitting that strong, blue light. It is so hard that it cannot be worked, cut, or ground. No amount of the hardest known abrasive will even roughen its surface. No blow, however great, will break it—it merely forces its way into the material of the hammer, however hard the hammer may be. No extremity of either heat or cold affects it in any degree, it is the same when in the most powerful electric arc as it is when immersed in liquid helium."

"How about acids?"

"That is what I am asking myself. Osnomians aren't much force at chemistry. I'm going to try to get hold of another one, and see if I can't analyze it, just for fun. I can't seem to convince myself that a real atomic structure could be that large."

"No, it is rather large for an atom," and turning to the two girls, "How do you like your solitaires?"

"They're perfectly beautiful, and the Tiffany mounting is exquisite," replied Dorothy, enthusiastically, "but they're so awfully big! They're as big as ten-carat diamonds, I do believe."

"Just about," replied Seaton, "but at that, they're the smallest Dunark could find. They have been kicking around for years, he says—so small that nobody wanted them. They wear big ones on their bracelets, you know. You sure will make a hit in Washington, Dottie. People will think you're wearing a bottle-stopper until they see it shining in the dark, then they'll think it's an automobile headlight. But after a few jewelers have seen these stones, one of them will be offering us five million dollars apiece for them, trying to buy them for some dizzy old dame who wants to put out the eyes of some of her social rivals. Yes? No?"

"That's about right, Dick," replied Crane, and his face wore a thoughtful look. "We can't keep it secret that we have a new jewel, since all four of us will be wearing them continuously, and anyone who knows jewels at all will recognize these as infinitely superior to any known Earthly jewel. In fact, they may get some of us into trouble, as fabulously valuable jewels usually do."

"That's true, too. So we'll let it out casually that they're as common as mud up here—that we're just wearing them for sentiment, which is true, and that we're thinking of bringing back a shipload to sell for parking lights."

"That would probably keep anyone from trying to murder our wives for their rings, at least."

"Have you read your marriage certificate, Dick?" asked Margaret.

"Not yet. Let's look at it, Dottie."

She produced the massive, heavily-jeweled document, and the auburn head and the brown one were very close to each other as they read together the English side of the certificate. Their vows were there, word for word, with their own signatures beneath them, all deeply engraved into the metal. Seaton smiled as he saw the legal form engraved below their signatures, and read aloud:

"That is SOME document," remarked Seaton. "Probably a lawyer could find fault with his phraseology, but I'll bet that this thing would hold in any court in the world. Think you'll get married again when we get back, Mart?"

Both girls protested, and Crane answered:

"No, I think not. Our ceremony would be rather an anticlimax after this one, and this one will undoubtedly prove legal. I intend to register this just as it is, and get a ruling from the courts. But it is time for breakfast. Pardon me—I should have said 'darprat,' for it certainly is not breakfast-time by Washington clocks. My watch says that it is eleven-thirty P. M."

"This system of time is funny," remarked Dorothy. "I just can't get used to having no night, and...."

"And it's such a long time between eats, as the famous governor said about the drinks," broke in Seaton.

"How did you know what I was going to say, Dick?"

"Husbandly intuition," he grinned, "aided and abetted by a normal appetite that rebels at seventeen hours between supper and breakfast, and nine hours between the other meals. Well, it's time to eat—let's go!"

After eating, the men hurried to the Skylark. During the sleeping-period the vessel had been banded with the copper repellers: the machine guns and instruments, including the wonderful Osnomian wireless system, had been installed; and, except for the power-bars, she was ready for a voyage. The Kondalian vessel was complete, even to the cushions, but was without instruments.

After a brief conversation with the officer in charge, Dunark turned to Seaton.

"Didn't you find that your springs couldn't stand up under the acceleration?"

"Yes, they flattened out dead."

"The Kolanix Felan, in charge of the work, thought so, and substituted our compound-compensated type, made of real spring metal, for them. They'll hold you through any acceleration you can live through."

"Thanks, that's fine. What's next, instruments?"

"Yes. I have sent a crew of men to gather up what copper they can find—you know that we use practically no metallic copper, as platinum, gold, and silver are so much better for ordinary purposes—and another to erect a copper-smelter near one of the mines which supply the city with the copper sulphate used upon our tables. While they are at work I think I will work on the instruments, if you two will be kind enough to help me."

Seaton and Crane offered to supply him with instruments from their reserve stock, but the Kofedix refused to accept them, saying that he would rather have their help in making them, so that he would thoroughly understand their functions. The electric furnaces were rapidly made ready and they set to work; Crane taking great delight in working that hitherto rare and very refractory metal, iridium, of which all the Kondalian instruments were to be made.

"They have a lot of our rare metals here, Dick."

"They sure have. I'd like to set up a laboratory and live here a few years—I'd learn something about my specialty or burst. They use gold and silver where we use copper, and platinum and its alloys where we use iron and soft steel. All their weapons are made of iridium, and all their most highly-tempered tools, such as their knives, razors, and so on, are made of opaque arenak. I suppose you've noticed the edge on your razor?"

"How could I help it? It is hard to realize that a metal can be so hard that it requires forty years on a diamond-dust abrasive machine to hone a razor—or that once honed, it shaves generation after generation of men without losing in any degree its keenness."

"I can't understand it, either—I only know that it's so. They have all our heavy metals in great abundance, and a lot more that we don't know anything about on Earth, but they apparently haven't any light metals at all. It must be that Osnome was thrown off the parent sun late, so that the light metals were all gone?"

"Something like that, possibly."

The extraordinary skill of the Kofedix made the manufacture of the instruments a short task, and after Crane had replaced the few broken instruments of the Skylark from their reserve stock, they turned their attention to the supply of copper that had been gathered. They found it enough for only two bars.

"Is this all we have?" asked Dunark, sharply.

"It is, your Highness," replied the Kolanix. "That is every scrap of metallic copper in the city."

"Oh, well, that'll be enough to last until we can smelt the rest," said Seaton. "With one bar apiece we're ready for anything Mardonale can start. Let 'em come!"

The bars were placed in the containers and both vessels were tried out, each making a perfect performance. Upon the following kokam, immediately after the first meal, the full party from the Earth boarded the Skylark and accompanied the Kofedix to the copper smelter. Dunark himself directed the work of preparing the charges and the molds, though he was continually being interrupted by wireless messages in code and by messengers bearing tidings too important to trust into the air.

"I hope you will excuse all of these delays," said Dunark, after the twentieth interruption, "but...."

"That's all right, Dunark. We know that you're a busy man."

"I can tell you about it, but I wouldn't want to tell many people. With the salt you gave us, I am preparing a power-plant that will enable us to blow Mardonale into...."

He broke off as a wireless call for help sounded. All listened intently, learning that a freight-plane was being pursued by a karlon a few hundred miles away.

"Now's the time for you to study one, Dunark!" Seaton exclaimed. "Get your gang of scientists out here while we go get him and drag him in!"

As Dunark sent the message, the Skylark's people hurried aboard, and Seaton drove the vessel toward the calls for help. With its great speed it reached the monster before the plane was overtaken. Focusing the attractor upon the enormous metallic beak of the karlon, Seaton threw on the power and the beast halted in midair as it was jerked backward and upward. As it saw the puny size of the attacking Skylark, it opened its cavernous mouth in a horrible roar and rushed at full speed. Seaton, unwilling to have the repellers stripped from the vessel, turned on the current actuating them. The karlon was hurled backward to the point of equilibrium of the two forces, where it struggled demoniacally.

Seaton carried his captive back to the smelter, where finally, by judicious pushing and pulling, he succeeded in turning the monster flat upon its back and pinning it to the ground in spite of its struggles to escape.

Soon the scientists arrived and studied the animal thoroughly, at as close a range as its flailing arms permitted.

"I wish we could kill him without blowing him to bits," wirelessed Dunark. "Do you know any way of doing it?"

"We could if we had a few barrels of ether, or some of our own poison gases, but they are all unknown here and it would take a long time to build the apparatus to make them. I'll see if I can't tire him out and get him that way as soon as you've studied him enough. We may be able to find out where he lives, too."

The scientists having finished their observations, Seaton jerked the animal a few miles into the air and shut off the forces acting upon it. There was a sudden crash, and the karlon, knowing that this apparently insignificant vessel was its master, turned in headlong flight.

"Have you any idea what caused the noise just then, Dick?" asked Crane; who, with characteristic imperturbability, had taken out his notebook and was making exact notes of all that transpired.

"I imagine we cracked a few of his plates," replied Seaton with a laugh, as he held the Skylark in place a few hundred feet above the fleeing animal.

Pitted for the first time in its life against an antagonist, who could both outfly and outfight it, the karlon redoubled its efforts and fled in a panic of fear. It flew back over the city of Kondalek, over the outlying country, and out over the ocean, still followed easily by the Skylark. As they neared the Mardonalian border, a fleet of warships rose to contest the entry of the monster. Seaton, not wishing to let the foe see the rejuvenated Skylark, jerked his captive high into the thin air. As soon as it was released, it headed for the ocean in an almost perpendicular dive, while Seaton focused an object-compass upon it.

"Go to it, old top," he addressed the plunging monster. "We'll follow you clear to the bottom of the ocean if you go that far!"

There was a mighty double splash as the karlon struck the water, closely followed by the Skylark. The girls gasped as the vessel plunged below the surface at such terrific speed, and seemed surprised that it had suffered no injury and that they had felt no jar. Seaton turned on the powerful searchlights and kept close enough so that he could see the monster through the transparent walls. Deeper and deeper the quarry dove, until it was plainly evident to the pursuers that it was just as much at home in the water as it was in the air. The beams of the lights revealed strange forms of life, among which were huge, staring-eyed fishes, which floundered about blindly in the unaccustomed glare. As the karlon bored still deeper, the living things became scarcer, but still occasional fleeting glimpses were obtained of the living nightmares which inhabited the oppressive depths of these strange seas. Continuing downward, the karlon plumbed the nethermost pit of the ocean and came to rest upon the bottom, stirring up a murk of ooze.

"How deep are we, Mart?"

"About four miles. I have read the pressure, but will have to calculate later exactly what depth it represents, from the gravity and density readings."

As the animal showed no sign of leaving its retreat, Seaton pulled it out with the attractor and it broke for the surface. Rising through the water at full speed, it burst into the air and soared upward to such an incredible height that Seaton was amazed.

"I wouldn't have believed that anything could fly in air this thin!" he exclaimed.

"It is thin up here," assented Crane. "Less than three pounds to the square inch. I wonder how he does it?"

"It doesn't look as though we are ever going to find out—he's sure a bear-cat!" replied Seaton, as the karlon, unable to ascend further, dropped in a slanting dive toward the lowlands of Kondal—the terrible, swampy region covered with poisonous vegetation and inhabited by frightful animals and even more frightful savages. The monster neared the ground with ever-increasing speed. Seaton, keeping close behind it, remarked to Crane:

"He'll have to flatten out pretty quick, or he'll burst something, sure."

But it did not flatten out. It struck the soft ground head foremost and disappeared, its tentacles apparently boring a way ahead of it.

Astonished at such an unlooked-for development, Seaton brought the Skylark to a stop and stabbed into the ground with the attractor. The first attempt brought up nothing but a pillar of muck, the second brought to light a couple of wings and one writhing arm, the third brought the whole animal, still struggling as strongly as it had in the first contest. Seaton again lifted the animal high into the air.

"If he does that again, we'll follow him."

"Will the ship stand it?" asked DuQuesne, with interest.

"Yes. The old bus wouldn't have, but this one can stand anything. We can go anywhere that thing can, that's a cinch. If we have enough power on, we probably won't even feel a jolt when we strike ground."

Seaton reduced the force acting upon the animal until just enough was left to keep the attractor upon it, and it again dived into the swamp. The Skylark followed, feeling its way in the total darkness, until the animal stopped, refusing to move in any direction, at a depth estimated by Crane to be about three-quarters of a mile. After waiting some time Seaton increased the power of the attractor and tore the karlon back to the surface and into the air, where it turned on the Skylark with redoubled fury.

"We've dug him out of his last refuge and he's fighting like a cornered rat," said Seaton as he repelled the monster to a safe distance. "He's apparently as fresh as when he started, in spite of all this playing. Talk about a game fish! He doesn't intend to run any more, though, so I guess we'll have to put him away. It's a shame to bump him off, but it's got to be done."

Crane aimed one of the heavy X-plosive bullets at the savagely-struggling monster, and the earth rocked with the concussion as the shell struck its mark. They hurried back to the smelter, where Dunark asked eagerly:

"What did you find out about it?"

"Nothing much," replied Seaton, and in a few words described the actions of the karlon. "What did your savants think of it?"

"Very little that any of us can understand in terms of any other known organism. It seems to combine all the characteristics of bird, beast, and fish, and to have within itself the possibilities of both bisexual and asexual reproduction."

"I wouldn't doubt it—it's a queer one, all right."

The copper bars were cool enough to handle, and the Skylark was loaded with five times its original supply of copper, the other vessel taking on a much smaller amount. After the Kofedix had directed the officer in charge to place the remaining bars in easily-accessible places throughout the nation, the two vessels were piloted back to the palace, arriving just in time for the last meal of the kokam.

"Well, Dunark," said Seaton after the meal was over, "I'm afraid that we must go back as soon as we can. Dorothy's parents and Martin's bankers will think they are dead by this time. We should start right now, but...."

"Oh, no, you must not do that. That would rob our people of the chance of bidding you goodbye."

"There's another reason, too. I have a mighty big favor to ask of you."

"It is granted. If man can do it, consider it done."

"Well, you know platinum is a very scarce and highly useful metal with us. I wonder if you could let us have a few tons of it? And I would like to have another faidon, too—I want to see if I can't analyze it."

"You have given us a thousand times the value of all the platinum and all the jewels your vessel can carry. As soon as the foundries are open tomorrow we will go and load up your store-rooms—or, if you wish, we will do it now."

"That isn't necessary. We may as well enjoy your hospitality for one more sleeping-period, get the platinum during the first work-period, and bid you goodbye just before the second meal. How would that be?"

"Perfectly satisfactory."

The following kokam, Dunark piloted the Skylark, with Seaton, Crane, and DuQuesne as crew, to one of the great platinum foundries. The girls remained behind to get ready for their departure, and for the great ceremony which was to precede it. The trip to the foundry was a short one, and the three scientists of Earth stared at what they saw—thousands of tons of platinum, cast into bars and piled up like pig-iron, waiting to be made into numerous articles of every-day use throughout the nation. Dunark wrote out an order, which his chief attendant handed to the officer in charge of the foundry, saying:

"Please have it loaded at once."

Seaton indicated the storage compartment into which the metal was to be carried, and a procession of slaves, two men staggering under one ingot, was soon formed between the pile and the storage room.

"How much are you loading on, Dunark?" asked Seaton, when the large compartment was more than half full.

"My order called for about twenty tons, in your weight, but I changed it later—we may as well fill that room full, so that the metal will not rattle around in flight. It doesn't make any difference to us, we have so much of it. It is like your gift of the salt, only vastly smaller."

"What are you going to do with it all, Dick?" asked Crane. "That is enough to break the platinum market completely."

"That's exactly what I'm going to do," returned Seaton, with a gleam in his gray eyes. "I'm going to burst this unjustifiable fad for platinum jewelry so wide open that it'll never recover, and make platinum again available for its proper uses, in laboratories and in the industries.

"You know yourself," he rushed on hotly, "that the only reason platinum is used at all for jewelry is that it is expensive. It isn't nearly so handsome as either gold or silver, and if it wasn't the most costly common metal we have, the jewelry-wearing crowd wouldn't touch it with a ten-foot pole. Useless as an ornament, it is the one absolutely indispensable laboratory metal, and literally hundreds of laboratories that need it can't have it because over half the world's supply is tied up in jeweler's windows and in useless baubles. Then, too, it is the best thing known for contact points in electrical machinery. When the Government and all the scientific societies were abjectly begging the jewelers to let loose a little of it they refused—they were selling it to profiteering spendthrifts at a hundred and fifty dollars an ounce. The condition isn't much better right now; it's a vicious circle. As long as the price stays high it will be used for jewelry, and as long as it is used for jewelry the price will stay high, and scientists will have to fight the jewelers for what little they get."

"While somewhat exaggerated, that is about the way matters stand. I will admit that I, too, am rather bitter on the subject," said Crane.

"Bitter? Of course you're bitter. Everybody is who knows anything about science and who has a brain in his head. Anybody who claims to be a scientist and yet stands for any of his folks buying platinum jewelry ought to be shot. But they'll get theirs as soon as we get back. They wouldn't let go of it before, they had too good a thing, but they'll let go now, and get their fingers burned besides. I'm going to dump this whole shipment at fifty cents a pound, and we'll take mighty good care that jewelers don't corner the supply."

"I'm with you, Dick, as usual."

Soon the storage room was filled to the ceiling with closely-stacked ingots of the precious metal, and the Skylark was driven back to the landing dock. She alighted beside Dunark's vessel, the Kondal, whose gorgeously-decorated crew of high officers sprang to attention as the four men stepped out. All were dressed for the ceremonial leave-taking, the three Americans wearing their spotless white, the Kondalians wearing their most resplendent trappings.

"This formal stuff sure does pull my cork!" exclaimed Seaton to Dunark. "I want to get this straight. The arrangement was that we were to be here at this time, all dressed up, and wait for the ladies, who are coming under the escort of your people?"

"Yes. Our family is to escort the ladies from the palace here. As they leave the elevator the surrounding war-vessels will salute, and after a brief ceremony you two will escort your wives into the Skylark, Doctor DuQuesne standing a little apart and following you in. The war-vessels will escort you as high as they can go, and the Kondal will accompany you as far as our most distant sun before turning back."

For a few moments Seaton nervously paced a short beat in front of the door of the space-car.

"I'm getting more fussed every second," he said abruptly, taking out his wireless instrument. "I'm going to see if they aren't about ready."

"What seems to be the trouble, Dick? Have you another hunch, or are you just rattled?" asked Crane.

"Rattled, I guess, but I sure do want to get going," he replied, as he worked the lever rapidly.

"Dottie," he sent out, and, the call being answered, "How long will you be? We're all ready and waiting, chewing our finger-nails with impatience."

"We'll soon be ready. The Karfedix is coming for us now."

Scarcely had the tiny sounder become silent when the air was shaken by an urgently-vibrated message, and every wireless sounder gave warning.

Seaton awoke, hot and uncomfortable, but with a great surge of joy in his heart—this was his wedding day! Springing from the bed, he released the full stream of the "cold" water, filling the tank in a few moments. Poising lightly upon the edge, he made a clean, sharp dive, and yelled in surprise as he came snorting to the surface. For Dunark had made good his promise—the water was only a few degrees above the freezing point! After a few minutes of vigorous splashing in the icy water, he rubbed himself down with a coarse towel, shaved, threw on his clothes, and lifted his powerful, but musical, bass voice in the wedding chorus from "The Rose Maiden."

he sang lustily, out of his sheer joy in being alive, and was surprised to hear Dorothy's clear soprano, Margaret's pleasing contralto, and Crane's mellow tenor chime in from the adjoining room. Crane threw open the door and Seaton joined the others.

"Good morning. Dick, you sound happy," said Crane.

"Who wouldn't be? Look what's doing today," as he ardently embraced his bride-to-be. "Besides, I found some cold water this morning."

"Everyone in the palace heard you discovering it," dryly returned Crane, and the girls laughed merrily.

"It surprised me at first," admitted Seaton, "but it's great after a fellow once gets wet."

"We warmed ours a trifle," said Dorothy. "I like a cold bath myself, but not in ice-water."

All four became silent, thinking of the coming event of the day, until Crane said:

"They have ministers here, I know, and I know something of their religion, but my knowledge is rather vague. You know more about it than we do, Dick, suppose you tell us about it while we wait."

Seaton paused a moment, with an odd look on his face. As one turning the pages of an unfamiliar book of reference, he was seeking the answer to Crane's question in the vast store of Osnomian information received from Dunark. His usually ready speech came a little slowly.

"Well, as nearly as I can explain it, it's a funny kind of a mixture—partly theology, partly Darwinism, or at least, making a fetish of evolution, and partly pure economic determinism. They believe in a Supreme Being, whom they call the First Cause—that is the nearest English equivalent—and they recognize the existence of an immortal and unknowable life-principle, or soul. They believe that the First Cause has decreed the survival of the fittest as the fundamental law, which belief accounts for their perfect physiques...."

"Perfect physiques? Why, they're as weak as children," interrupted Dorothy.

"Yes, but that is because of the smallness of the planet," returned Seaton. "You see, a man of my size weighs only eighty-six pounds here, on a spring balance, so he would need only the muscular development of a boy of twelve or so. In a contest of strength, either of you girls could easily handle two of the strongest men upon Osnome. In fact, the average Osnomian could stand up on our Earth only with the greatest difficulty. But that isn't the fault of the people; they are magnificently developed for their surroundings. They have attained this condition by centuries of weeding out the unfit. They have no hospitals for the feeble-minded or feeble-bodied—abnormal persons are not allowed to live. The same reasoning accounts for their perfect cleanliness, moral and physical. Vice is practically unknown. They believe that clean living and clean thinking are rewarded by the production of a better physical and mental type...."

"Yes, especially as they correct wrong living by those terrible punishments the Kofedix told us about," interrupted Margaret.

"That probably helps some. They also believe that the higher the type is, the faster will evolution proceed, and the sooner will mankind reach what they call the Ultimate Goal, and know all things. Believing as they do that the fittest must survive, and thinking themselves, of course, the superior type, it is ordained that Mardonale must be destroyed utterly, root and branch. They believe that the slaves are so low in the scale, millions of years behind in evolution, that they do not count. Slaves are simply intelligent and docile animals, little more than horses or oxen. Mardonalians and savages are unfit to survive and must be exterminated.

"Their ministers are chosen from the very fittest. They are the strongest, cleanest-living, and most vigorous men of this clean and vigorous nation, and are usually high army officers as well as ministers."

An attendant announced the coming of the Karfedix and his son, to pay the call of state. After the ceremonious greetings had been exchanged, all went into the dining hall for darprat. As soon as the meal was over, Seaton brought up the question of the double wedding that kokam, and the Karfedix was overjoyed.

"Karfedix Seaton," he said earnestly, "nothing could please us more than to have such a ceremony performed in our palace. Marriage between such highly-evolved persons as are you four is wished by the First Cause, whose servants we are. Aside from that, it is an unheard-of honor for any ruler to have even one karfedix married beneath his roof, and you are granting me the privilege of two! I thank you, and assure you that we will do our poor best to make the occasion memorable."

"Don't do anything fancy," said Seaton hastily. "A simple, plain wedding will do."

Unheeding Seaton's remark, the Karfedix took his wireless from its hook at his belt and sent a brief message.

"I have summoned Karbix Tarnan to perform the ceremony. Our usual time for ceremonies is just before koprat—is that time satisfactory to you?"

Assured that it was, he turned to his son.

"Dunark, you are more familiar than I with the customs of our illustrious visitors. May I ask you to take charge of the details?"

While Dunark sent a rapid succession of messages, Dorothy whispered to Seaton:

"They must be going to make a real function of our double wedding, Dick. The Karbix is the highest dignitary of the church, isn't he?"

"Yes, in addition to being the Commander-in-Chief of all the Kondalian armies. Next to the Karfedix he is the most powerful man in the empire. Something tells me, Dottie, that this is going to be SOME ceremony!"

As Dunark finished telegraphing, Seaton turned to him.

"Dorothy said, a while ago, that she would like to have enough of that tapestry-fabric for a dress. Do you suppose it could be managed?"

"Certainly. In all state ceremonials we always wear robes made out of the same fabric as the tapestries, but much finer and more delicate. I would have suggested it, but thought perhaps the ladies would prefer their usual clothing. I know that you two men do not care to wear our robes?"

"We will wear white ducks, the dressiest and coolest things we have along," replied Seaton. "Thank you for your offer, but you know how it is. We should feel out of place in such gorgeous dress."

"I understand. I will call in a few of our most expert robe-makers, who will weave the gowns. Before they come, let us decide upon the ceremony. I think you are familiar with our marriage customs, but I will explain them to make sure. Each couple is married twice. The first marriage is symbolized by the exchange of plain bracelets and lasts four karkamo, during which period divorce may be obtained at will. The children of such divorced couples formerly became wards of the state, but in my lifetime I have not heard of there being any such children—all divorces are now between couples who discover their incompatibility before children are conceived."

"That surprises me greatly," said Crane. "Some system of trial-marriage is advocated among us on Earth every few years, but they all so surely degenerate into free love that no such system has found a foothold."

"We are not troubled in that way at all. You see, before the first marriage, each couple, from the humblest peasantry to the highest royalty, must submit to a mental examination. If they are marrying for any reason at all other than love, such as any thought of trifling in the mind of the man, or if the woman is marrying him for his wealth or position, he or she is summarily executed, regardless of station."

No other questions being asked, Dunark continued:

"At the end of four karkamo the second marriage is performed, which is indissoluble. In this ceremony jeweled bracelets are substituted for the plain ones. In the case of highly-evolved persons it is permitted that the two ceremonies be combined into one. Then there is a third ceremony, used only in the marriage of persons of the very highest evolution, in which the 'eternal' vows are taken and the faidon, the eternal jewel, is exchanged. As you are all in the permitted class, you may use the eternal ceremony if you wish."

"I think we all know our minds well enough to know that we want to be married for good—the longer the better," said Seaton, positively. "We'll make it the eternal, won't we, folks?"

"I should like to ask one question," said Crane, thoughtfully. "Does that ceremony imply that my wife would be breaking her vows if she married again upon my death?"

"Far from it. Numbers of our men are killed every karkam. Their wives, if of marriageable age, are expected to marry again. Then, too, you know that most Kondalian men have several wives. No matter how many wives or husbands may be linked together in that way, it merely means that after death their spirits will be grouped into one. Just as in your chemistry," smiling in comradely fashion at Seaton, "a varying number of elements may unite to form a stable compound."

After a short pause, the speaker went on:

"Since you are from the Earth and unaccustomed to bracelets, rings will be substituted for them. The plain rings will take the place of your Earthly wedding rings, the jeweled ones that of your engagement rings. The only difference is that while we discard the plain bracelets, you will continue to wear them. Have you men any objections to wearing the rings during the ceremony? You may discard them later if you wish and still keep the marriage valid."

"Not I! I'll wear mine all my life," responded Seaton earnestly, and Crane expressed the same thought.

"There is only one more thing," added the Kofedix. "That is, about the mental examination. Since it is not your custom, it is probable that the justices would waive the ruling, especially since everyone must be examined by a jury of his own or a superior rank, so that only one man, my father alone, could examine you."

"Not in a thousand years!" replied Seaton emphatically. "I want to be examined, and have Dorothy see the record. I don't care about having her put through it, but I want her to know exactly the kind of a guy she is getting."

Dorothy protested at this, but as all four were eager that they themselves should be tested, the Karfedix was notified and Dunark clamped sets of multiple electrodes, connected to a set of instruments, upon the temples of his father, Dorothy, and Seaton. He pressed a lever, and instantly Dorothy and Seaton read each other's minds to the minutest detail, and each knew that the Karfedix was reading the minds of both.

After Margaret and Crane had been examined, the Karfedix expressed himself as more than satisfied.

"You are all of the highest evolution and your minds are all untainted by any base thoughts in your marriage. The First Cause will smile upon your unions," he said solemnly.

"Let the robe-makers appear," the Karfedix ordered, and four women, hung with spools of brilliantly-colored wire of incredible fineness and with peculiar looms under their arms, entered the room and accompanied the two girls to their apartment.

As soon as the room was empty save for the four men, Dunark said:

"While I was in Mardonale, I heard bits of conversation regarding an immense military discovery possessed by Nalboon, besides the gas whose deadly effects we felt. I could get no inkling of its nature, but feel sure that it is something to be dreaded. I also heard that both of these secrets had been stolen from Kondal, and that we were to be destroyed by our own superior inventions."

The Karfedix nodded his head gloomily.

"That is true, my son—partly true, at least. We shall not be destroyed, however. Kondal shall triumph. The discoveries were made by a Kondalian, but I am as ignorant as are you concerning their nature. An obscure inventor, living close to the bordering ocean, was the discoverer. He was rash enough to wireless me concerning them. He would not reveal their nature, but requested a guard. The Mardonalian patrol intercepted the message and captured both him and his discoveries before our guard could arrive."

"That's easily fixed," suggested Seaton. "Let's get the Skylark fixed up, and we'll go jerk Nalboon out of his palace—if he's still alive—bring him over here, and read his mind."

"That might prove feasible," answered the Kofedix, "and in any event we must repair the Skylark and replenish her supply of copper immediately. That must be our first consideration, so that you, our guests, will have a protection in any emergency."

The Karfedix went to his duties and the other three made their way to the wrecked space-car. They found that besides the damage done to the hull, many of the instruments were broken, including one of the object-compasses focused upon the Earth.

"It's a good thing you had three of them, Mart. I sure hand it to you for preparedness," said Seaton, as he tossed the broken instruments out upon the dock. Dunark protested at this treatment, and placed the discarded instruments in a strong metal safe, remarking:

"These things may prove useful at some future time."

"Well, I suppose the first thing to do is to get some powerful jacks and straighten these plates," said Seaton.

"Why not throw away this soft metal, steel, and build it of arenak, as it should be built? You have plenty of salt," suggested Dunark.

"Fine! We have lots of salt in the galley, haven't we, Mart?"

"Yes, nearly a hundred pounds. We are stocked for emergencies, with two years' supply of food, you know."

Dunark's eyes opened in astonishment at the amount mentioned, in spite of his knowledge of earthly conditions. He started to say something, then stopped in confusion, but Seaton divined his thought.

"We can spare him fifty pounds as well as not, can't we, Mart?"

"Certainly. Fifty pounds of salt is a ridiculously cheap price for what he is doing for us, even though it is very rare here."

Dunark acknowledged the gift with shining eyes and heartfelt, but not profuse, thanks, and bore the precious bag to the palace under a heavy escort. He returned with a small army of workmen, and after making tests to assure himself that the power-bar would work as well through arenak as through steel, he instructed the officers concerning the work to be done. As the wonderfully skilled mechanics set to work without a single useless motion, the prince stood silent, with a look of care upon his handsome face.

"Worrying about Mardonale, Dunark?"

"Yes. I cannot help wondering what that terrible new engine of destruction is, which Nalboon now has at his command."

"Say, why don't you build a bus like the Skylark, and blow Mardonale off the map?"

"Building the vessel would be easy enough, but X is as yet unknown upon Osnome."

"We've got a lot of it...."

"I could not accept it. The salt was different, since you have plenty. X, however, is as scarce upon Earth as salt is upon Osnome."

"Sure you can accept it. We stopped at a planet that has lots of it, and we've got an object-compass pointing at it so that we can go back and get more of it any time we want it. We've got more of it on hand now than we're apt to need for a long time, so have a hunk and get busy," and he easily carried one of the lumps out of his cabin and tossed it upon the dock, from whence it required two of Kondal's strongest men to lift it.

The look of care vanished from the face of the prince and he summoned another corps of mechanics.

"How thick shall the walls be? Our battleships are armed with arenak the thickness of a hand, but with your vast supply of salt you may have it any thickness you wish, since the materials of the matrix are cheap and abundant."

"One inch would be enough, but everything in the bus is designed for a four-foot shell, and if we change it from four feet we'll have to redesign our guns and all our instruments. Let's make it four feet."

Seaton turned to the crippled Skylark, upon which the first crew of Kondalian mechanics were working with skill and with tools undreamed-of upon Earth. The whole interior of the vessel was supported by a complex falsework of latticed metal, then the four-foot steel plates and the mighty embers, the pride of the great MacDougall, were cut away as though they were made of paper by revolving saws and enormous power shears. The sphere, grooved for the repellers and with the members, braces, and central machinery complete, of the exact dimensions of the originals, was rapidly moulded of a stiff, plastic substance resembling clay. This matrix soon hardened into a rock-like mass into which the doors, machine-gun emplacements, and other openings were carefully cut. All surfaces were then washed with a dilute solution of salt, which the workmen handled as though it were radium. Two great plates of platinum were clamped into place upon either side of the vessel, each plate connected by means of silver cables as large as a man's leg to the receiving terminal of an enormous wireless power station. The current was applied and the great spherical mass apparently disappeared, being transformed instantly into the transparent metal arenak. Then indeed had the Earth-men a vehicle such as had never been seen before! A four-foot shell of metal five hundred times as strong and hard as the strongest and hardest steel, cast in one piece with the sustaining framework designed by the world's foremost engineer—a structure that no conceivable force could deform or injure, housing an inconceivable propulsive force!

The falsework was rapidly removed and the sustaining framework was painted with opaque varnish to render it plainly visible. At Seaton's suggestion the walls of the cabins were also painted, leaving transparent several small areas to serve as windows.

The second work-period was drawing to a close, and as Seaton and Crane were to be married before koprat, they stopped work. They marveled at the amount that had been accomplished, and the Kofedix told them:

"Both vessels will be finished tomorrow, except for the controlling instruments, which we will have to make ourselves. Another crew will work during the sleeping-period, installing the guns and other fittings. Do you wish to have your own guns installed, or guns of our pattern? You are familiar with them now."

"Our own, please. They are slower and less efficient than yours, but we are used to them and have a lot of X-plosive ammunition for them," replied Seaton, after a short conference with Crane.

After instructing the officers in charge of the work, the three returned to the palace, the hearts of two of them beating high in anticipation. Seaton went into Crane's room, accompanied by two attendants bearing his suitcase and other luggage.

"We should have brought along dress clothes, Mart. Why didn't you think of that, too?"

"Nothing like this ever entered my mind. It is a good thing we brought along ducks and white soft shirts. I must say that this is extremely informal garb for a state wedding, but since the natives are ignorant of our customs, it will not make any difference."

"That's right, too—we'll make 'em think it's the most formal kind of dress. Dunark knows what's what, but he knows that full dress would be unbearable here. We'd melt down in a minute. It's plenty hot enough as it is, with only duck trousers and sport-shirts on. They'll look green instead of white, but that's a small matter."

Dunark, as best man, entered the room some time later.

"Give us a look, Dunark," begged Seaton, "and see if we'll pass inspection. I was never so rattled in my life."

They were clad in spotless white, from their duck oxfords to the white ties encircling the open collars of their tennis shirts. The two tall figures—Crane's slender, wiry, at perfect ease; Seaton's broad-shouldered, powerful, prowling about with unconscious, feline suppleness and grace—and the two handsome, high-bred, intellectual faces, each wearing a look of eager happiness, fully justified Dunark's answer.

"You sure will do!" he pronounced enthusiastically, and with Seaton's own impulsive good will he shook hands and wished them an eternity of happiness.

"When you have spoken with your brides," he continued, "I shall be waiting to escort you into the chapel. Sitar told me to say that the ladies are ready."

Dorothy and Margaret had been dressed in their bridal gowns by Sitar and several other princesses, under the watchful eyes of the Karfedir herself. Sitar placed the two girls side by side and drew off to survey her work.

"You are the loveliest creatures in the whole world!" she cried.

They looked at each other's glittering gowns, then Margaret glanced at Dorothy's face and a look of dismay overspread her own.

"Oh, Dottie!" she gasped. "Your lovely complexion! Isn't it terrible for the boys to see us in this light?"

There was a peal of delighted laughter from Sitar and she spoke to one of the servants, who drew dark curtains across the windows and pressed a switch, flooding the room with brilliant white light.

"Dunark installed lamps like those of your ship for you," she explained with intense satisfaction. "I knew in advance just how you would feel about your color."

Before the girls had time to thank their thoughtful hostess she disappeared and their bridegrooms stood before them. For a moment no word was spoken. Seaton stared at Dorothy hungrily, almost doubting the evidence of his senses. For white was white, pink was pink, and her hair shone in all its natural splendor of burnished bronze.

In their wondrous Osnomian bridal robes the beautiful Earth-maidens stood before their lovers. Upon their feet were jeweled slippers. Their lovely bodies were clothed in softly shimmering garments that left their rounded arms and throats bare—garments infinitely more supple than the finest silk, thick-woven of metallic threads of such fineness that the individual wires were visible only under a lens; garments that floated and clung about their perfect forms in lines of exquisite grace. For black-haired Margaret, with her ivory skin, the Kondalian princess had chosen a background of a rare white metal, upon which, in complicated figures, glistened numberless jewels of pale colors, more brilliant than diamonds. Dorothy's dress was of a peculiar, dark-green shade, half-hidden by an intricate design of blazing green gems—the strange, luminous jewels of this strange world. Both girls wore their long, heavy hair unbound, after the Kondalian bridal fashion, brushed until it fell like mist about them and confined at the temples by metallic bands entirely covered with jewels.

Seaton looked from Dorothy to Margaret and back again; looked down into her violet eyes, deep with wonder and with love, more beautiful than any jewel in all her gorgeous costume. Unheeding the presence of the others, she put her dainty hands upon his mighty shoulders and stood on tiptoe.

"I love you, Dick. Now and always, here or at home or anywhere in the Universe. We'll never be parted again," she whispered, and her own beloved violin had no sweeter tones than had her voice.

A few minutes later, her eyes wet and shining, she drew herself away from him and glanced at Margaret.

"Isn't she the most beautiful thing you ever laid eyes on?"

"No," Seaton answered promptly, "she is not—but poor old Mart thinks she is!"

Accompanied by the Karfedix and his son, Seaton and Crane went into the chapel, which, already brilliant, had been decorated anew with even greater splendor. Glancing through the wide arches they saw, for the first time, Osnomians clothed. The great room was filled with the highest nobility of Kondal, wearing their heavily-jeweled, resplendent robes of state. Every color of the rainbow and numberless fantastic patterns were there, embodied in the soft, lustrous, metallic fabric.

As the men entered one door Dorothy and Margaret, with the Karfedir and Sitar, entered the other, and the entire assemblage rose to its feet and snapped into the grand salute. Moving to the accompaniment of strange martial music from concealed instruments, the two parties approached each other, meeting at the raised platform or pulpit where Karbix Tarnan, a handsome, stately, middle-aged man who carried easily his hundred and fifty karkamo of age, awaited them. As he raised his arms, the music ceased.

It was a solemn and wonderfully impressive spectacle. The room, of burnished metal, with its bizarre decorations wrought in scintillating gems; the constantly changing harmony of colors as the invisible lamps were shifted from one shade to another; the group of mighty nobles standing rigidly at attention in a silence so profound that it was an utter absence of everything audible as the Karbix lifted both arms in a silent invocation of the great First Cause—all these things deepened the solemnity of that solemn moment.

When Tarnan spoke, his voice, deep with some great feeling, inexplicable even to those who knew him best, carried clearly to every part of the great chamber.

"Friends, it is our privilege to assist today in a most notable event, the marriage of four personages from another world. For the first time in the history of Osnome, one karfedix has the privilege of entertaining the bridal party of another. It is not for this fact alone, however, that this occasion is to be memorable. A far deeper reason is that we are witnessing, possibly for the first time in the history of the Universe, the meeting upon terms of mutual fellowship and understanding of the inhabitants of two worlds separated by unthinkable distances of trackless space and by equally great differences in evolution, conditions of life, and environment. Yet these strangers are actuated by the spirit of good faith and honor which is instilled into every worthy being by the great First Cause, in the working out of whose vast projects all things are humble instruments.

"In honor of the friendship of the two worlds, we will proceed with the ceremony.

"Richard Seaton and Martin Crane, exchange the plain rings with Dorothy Vaneman and Margaret Spencer."

They did so, and repeated, after the Karbix, simple vows of love and loyalty.

"May the First Cause smile upon this temporary marriage and render it worthy of being made permanent. As a lowly servant of the all-powerful First Cause I pronounce you two, and you two, husband and wife. But we must remember that the dull vision of mortal man cannot pierce the veil of futurity, which is as crystal to the all-beholding eye of the First Cause. Though you love each other truly, unforeseen things may come between you to mar the perfection of your happiness. Therefore a time is granted you during which you may discover whether or not your unions are perfect."

A pause ensued, then Tarnan went on:

"Martin Crane, Margaret Spencer, Richard Seaton, and Dorothy Vaneman, you are before us to take the final vows which shall bind your bodies together for life and your spirits together for eternity. Have you considered the gravity of this step sufficiently to enter into this marriage without reservation?"

"I have," solemnly replied the four, in unison.

"Exchange the jeweled rings. Do you, Richard Seaton and Dorothy Vaneman; and you, Martin Crane and Margaret Spencer; individually swear, here in the presence of the First Cause and that of the Supreme Justices of Kondal, that you will be true and loyal, each helping his chosen one in all things, great and small; that never throughout eternity, in thought or in action, will either your body or your mind or your conscious spirit stray from the path of fairness and truth and honor?"

"I do."

"I pronounce you married with the eternal marriage. Just as the faidon which you each now wear—the eternal jewel which no force of man, however applied, has yet been able to change or deform in any particular; and which continues to give off its inward light without change throughout eternity—shall endure through endless cycles of time after the metal of the ring which holds it shall have crumbled in decay: even so shall your spirits, formerly two, now one and indissoluble, progress in ever-ascending evolution throughout eternity after the base material which is your bodies shall have returned to the senseless dust from whence it arose."

The Karbix lowered his arms and the bridal party walked to the door through a double rank of uplifted weapons. From the chapel they were led to another room, where the contracting parties signed their names in a register. The Kofedix then brought forward two marriage certificates—heavy square plates of a brilliant purple metal, beautifully engraved in parallel columns of English and Kondalian script, and heavily bordered with precious stones. The principals and witnesses signed below each column, the signatures being deeply engraved by the royal engraver. Leaving the registry, they were escorted to the dining hall, where a truly royal repast was served. Between courses the highest nobles of the nation welcomed the visitors and wished them happiness in short but earnest addresses. After the last course had been disposed of, the Karbix rose at a sign from the Karfedix and spoke, his voice again agitated by the emotion which had puzzled his hearers during the marriage service.

"All Kondal is with us here in spirit, trying to aid us in our poor attempts to convey our welcome to these our guests, of whose friendship no greater warrant could be given than their willingness to grant us the privilege of their marriage. Not only have they given us a boon that will make their names revered throughout the nation as long as Kondal shall exist, but they have also been the means of showing us plainly that the First Cause is upon our side, that our age-old institution of honor is in truth the only foundation upon which can be built a race fitted to survive. At the same time they have been the means of showing us that our hated foe, entirely without honor, building his race upon a foundation of bloodthirsty savagery alone, is building wrongly and must perish utterly from the face of Osnome."

His hearers listened, impressed by his earnestness, but plainly not understanding his meaning.

"You do not understand?" he went on, with a deep light shining in his eyes. "It is inevitable that two peoples inhabiting worlds so widely separated as are our two should be possessed of widely-varying knowledge and abilities, and these strangers have already made it possible for us to construct engines of destruction which shall obliterate Mardonale completely...." A fierce shout of joy interrupted the speaker and the nobles sprang to their feet, saluting the visitors with upraised weapons. As soon as they had reseated themselves, the Karbix continued:

"That is the boon. The vindication of our system of evolution is easily explained. The strangers landed first upon Mardonale. Had Nalboon met them in honor, he would have gained the boon. But he, with the savagery characteristic of his evolution, attempted to kill his guests and steal their treasures, with what results you already know. We, on our part, in exchange for the few and trifling services we have been able to render them, have received even more than Nalboon would have obtained, had his plans not been nullified by their vastly superior state of evolution."

The orator seated himself and there was a deafening clamor of cheering as the nobles formed themselves into an escort of honor and conducted the two couples to their apartments.

Alone in their room, Dorothy turned to her husband with tears shining in her beautiful eyes.

"Dick, sweetheart, wasn't that the most wonderful thing that anybody ever heard of? Using the word in all its real meaning, it was indescribably grand, and that old man is simply superb. It makes me ashamed of myself to think that I was ever afraid or nervous here."

"It sure was all of that, Dottie mine, little bride of an hour. The whole thing gets right down to where a fellow lives—I've got a lump in my throat right now so big that it hurts me to think. Earthly marriages are piffling in comparison with that ceremony. It's no wonder they're happy, after taking those vows—especially as they don't have to take them until after they are sure of themselves.

"But we're sure already, sweetheart," as he embraced her with all the feeling of his nature. "Those vows are not a bit stronger than the ones we have already exchanged—bodily and mentally and spiritually we are one, now and forever."