His “planet” was the smallest in the solar system, and the loneliest, Thad Allen was thinking, as he straightened wearily in the huge, bulging, inflated fabric of his Osprey space armor. Walking awkwardly in the magnetic boots that held him to the black mass of meteoric iron, he mounted a projection and stood motionless, staring moodily away through the vision panels of his bulky helmet into the dark mystery of the void.

His welding arc dangled at his belt, the electrode still glowing red. He had just finished securing to this slowly-accumulated mass of iron his most recent find, a meteorite the size of his head.

Five perilous weeks he had labored, to collect this rugged lump of metal--a jagged mass, some ten feet in diameter, composed of hundreds of fragments, that he had captured and welded together. His luck had not been good. His findings had been heart-breakingly small; the spectro-flash analysis had revealed that the content of the precious metals was disappointingly minute.[1]

[Footnote 1: The meteor or asteroid belt, between the orbits of Mars and Jupiter, is “mined” by such adventurers as Thad Allen for the platinum, iridium and osmium that all meteoric irons contain in small quantities. The meteor swarms are supposed by some astronomers to be fragments of a disrupted planet, which, according to Bode’s Law, should occupy this space.]

On the other side of this tiny sphere of hard-won treasure, his Millen atomic rocket was sputtering, spurts of hot blue flame jetting from its exhaust. A simple mechanism, bolted to the first sizable fragment he had captured, it drove the iron ball through space like a ship.

Through the magnetic soles of his insulated boots, Thad could feel the vibration of the iron mass, beneath the rocket’s regular thrust. The magazine of uranite fuel capsules was nearly empty, now, he reflected. He would soon have to turn back toward Mars.

Turn back. But how could he, with so slender a reward for his efforts? Meteor mining is expensive. There was his bill at Millen and Helion, Mars, for uranite and supplies. And the unpaid last instalment on his Osprey suit. How could he outfit himself again, if he returned with no more metal than this? There were men who averaged a thousand tons of iron a month. Why couldn’t fortune smile on him?

He knew men who had made fabulous strikes, who had captured whole planetoids of rich metal, and he knew weary, white-haired men who had braved the perils of vacuum and absolute cold and bullet-swift meteors for hard years, who still hoped.

But sometime fortune had to smile, and then...

The picture came to him. A tower of white metal, among the low red hills near Helion. A slim, graceful tower of argent, rising in a fragrant garden of flowering Martian shrubs, purple and saffron. And a girl waiting, at the silver door--a trim, slender girl in white, with blue eyes and hair richly brown.

Thad had seen the white tower many times, on his holiday tramps through the hills about Helion. He had even dared to ask if it could be bought, to find that its price was an amount that he might not amass in many years at his perilous profession. But the girl in white was yet only a glorious dream...

Gigantic claws seemed to reach out of empty air.

The strangeness of interplanetary space, and the somber mystery of it, pressed upon him like an illimitable and deserted ocean. The sun was a tiny white disk on his right, hanging between rosy coronal wings; his native Earth, a bright greenish point suspended in the dark gulf below it; Mars, nearer, smaller, a little ocher speck above the shrunken sun. Above him, below him, in all directions was vastness, blackness, emptiness. Ebon infinity, sprinkled with far, cold stars.

Thad was alone. Utterly alone. No man was visible, in all the supernal vastness of space. And no work of man--save the few tools of his daring trade, and the glittering little rocket bolted to the black iron behind him. It was terrible to think that the nearest human being must be tens of millions of miles away.

On his first trips, the loneliness had been terrible, unendurable. Now he was becoming accustomed to it. At least, he no longer feared that he was going mad. But sometimes...

Thad shook himself and spoke aloud, his voice ringing hollow in his huge metal helmet:

“Brace up, old top. In good company, when you’re by yourself, as Dad used to say. Be back in Helion in a week or so, anyhow. Look up Dan and ‘Chuck’ and the rest of the crowd again, at Comet’s place. What price a friendly boxing match with Mason, or an evening at the teleview theater?

“Fresh air instead of this stale synthetic stuff! Real food, in place of these tasteless concentrates! A hot bath, instead of greasing yourself!

“Too dull out here. Life--” He broke off, set his jaw.

No use thinking about such things. Only made it worse. Besides, how did he know that a whirring meteor wasn’t going to flash him out before he got back?

He drew his right arm out of the bulging sleeve of the suit, into its ample interior, found a cigarette in an inside pocket, and lighted it. The smoke swirled about in the helmet, drawn swiftly into the air filters.

“Darn clever, these suits,” he murmured. “Food, smokes, water generator, all where you can reach them. And darned expensive, too. I’d better be looking for pay metal!”

He clambered to a better position; stood peering out into space, searching for the tiny gleam of sunlight on a meteoric fragment that might be worth capturing for its content of precious metals. For an hour he scanned the black, star-strewn gulf, as the sputtering rocket continued to drive him forward.

“There she glows!” he cried suddenly, and grinned.

Before him was a tiny, glowing fleck, that moved among the unchanging stars. He stared at it intensely, breathing faster in the helmet.

Always he thrilled to see such a moving gleam. What treasure it promised! At first sight, it was impossible to determine size or distance or rate of motion. It might be ten thousand tons of rich metal. A fortune! It would more probably prove to be a tiny, stony mass, not worth capturing. It might even be large and valuable, but moving so rapidly that he could not overtake it with the power of the diminutive Millen rocket.

He studied the tiny speck intently, with practised eye, as the minutes passed--an untrained eye would never have seen it at all, among the flaming hosts of stars. Skilfully he judged, from its apparent rate of motion and its slow increase in brilliance, its size and distance from him.

“Must be--must be fair size,” he spoke aloud, at length. “A hundred tons, I’ll bet my helmet! But scooting along pretty fast. Stretch the little old rocket to run it down.”

He clambered back to the rocket, changed the angle of the flaming exhaust, to drive him directly across the path of the object ahead, filled the magazine again with the little pellets of uranite, which were fed automatically into the combustion chamber, and increased the firing rate.

The trailing blue flame reached farther backward from the incandescent orifice of the exhaust. The vibration of the metal sphere increased. Thad left the sputtering rocket and went back where he could see the object before him.

It was nearer now, rushing obliquely across his path. Would he be in time to capture it as it passed, or would it hurtle by ahead of him, and vanish in the limitless darkness of space before his feeble rocket could check the momentum of his ball of metal?

He peered at it, as it drew closer.

Its surface seemed oddly bright, silvery. Not the dull black of meteoric iron. And it was larger, more distant, than he had thought at first. In form, too, it seemed curiously regular, ellipsoid. It was no jagged mass of metal.

His hopes sank, rose again immediately. Even if it were not the mass of rich metal for which he had prayed, it might be something as valuable--and more interesting.

He returned to the rocket, adjusted the angle of the nozzle again, and advanced the firing time slightly, even at the risk of a ruinous explosion.

When he returned to where he could see the hurtling object before him, he saw that it was a ship. A tapering silver-green rocket-flier.

Once more his dreams were dashed. The officers of interplanetary liners lose no love upon the meteor miners, claiming that their collected masses of metal, almost helpless, always underpowered, are menaces to navigation. Thad could expect nothing from the ship save a heliographed warning to keep clear.

But how came a rocket-flier here, in the perilous swarms of the meteor belt? Many a vessel had been destroyed by collision with an asteroid, in the days before charted lanes were cleared of drifting metal.

The lanes more frequently used, between Earth, Mars, Venus and Mercury, were of course far inside the orbits of the asteroids. And the few ships running to Jupiter’s moons avoided them by crossing millions of miles above their plane.

Could it be that legendary green ship, said once to have mysteriously appeared, sliced up and drawn within her hull several of the primitive ships of that day, and then disappeared forever after in the remote wastes of space? Absurd, of course: he dismissed the idle fancy and examined the ship still more closely.

Then he saw that it was turning, end over end, very slowly. That meant that its gyros were stopped; that it was helpless, drifting, disabled, powerless to avoid hurtling meteoric stones. Had it blundered unawares into the belt of swarms--been struck before the danger was realized? Was it a derelict, with all dead upon it?

Either the ship’s machinery was completely wrecked, Thad knew, or there was no one on watch. For the controls of a modern rocket-flier are so simple and so nearly automatic that a single man at the bridge can keep a vessel upon her course.

It might be, he thought, that a meteorite had ripped open the hull, allowing the air to escape so quickly that the entire crew had been asphyxiated before any repairs could be made. But that seemed unlikely, since the ship must have been divided into several compartments by air-tight bulkheads.

Could the vessel have been deserted for some reason? The crew might have mutinied, and left her in the life-tubes. She might have been robbed by pirates, and set adrift. But with the space lanes policed as they were, piracy and successful mutiny were rare.

Thad saw that the flier’s navigation lights were out.

He found the heliograph signal mirror at his side, sighted it upon the ship, and worked the mirror rapidly. He waited, repeated the call. There was no response.

The vessel was plainly a derelict. Could he board her, and take her to Mars? By law, it was his duty to attempt to aid any helpless ship, or at least to try to save any endangered lives upon her. And the salvage award, if the ship should be deserted and he could bring her safe to port, would be half her value.

No mean prize, that. Half the value of ship and cargo! More than he was apt to earn in years of mining the meteor-belt.

With new anxiety, he measured the relative motion of the gleaming ship. It was going to pass ahead of him. And very soon. No more time for speculation. It was still uncertain whether it would come near enough so that he could get a line to it.

Rapidly he unslung from his belt the apparatus he used to capture meteors. A powerful electromagnet, with a thin, strong wire fastened to it, to be hurled from a helix-gun. He set the drum on which the wire was wound upon the metal at his feet, fastened it with its magnetic anchor, wondering if it would stand the terrific strain when the wire tightened.

Raising the helix to his shoulder, he trained it upon a point well ahead of the rushing flier, and stood waiting for the exact moment to press the lever. The slender spindle of the ship was only a mile away now, bright in the sunlight. He could see no break in her polished hull, save for the dark rows of circular ports. She was not, by any means, completely wrecked.

He read the black letters of her name.

Red Dragon.

The name of her home port, below, was in smaller letters. But in a moment he made them out. San Francisco. The ship then came from the Earth! From the very city where Thad was born!

The gleaming hull was near now. Only a few hundred yards away. Passing. Aiming well ahead of her, to allow for her motion, Thad pressed the key that hurled the magnet from the helix. It flung away from him, the wire screaming from the reel behind it.

Thad’s mass of metal swung on past the ship, as he returned to the rocket and stopped its clattering explosions. He watched the tiny black speck of the magnet. It vanished from sight in the darkness of space, appeared again against the white, burnished hull of the rocket ship.

For a painful instant he thought he had missed. Then he saw that the magnet was fast to the side of the flier, near the stern. The line tightened. Soon the strain would come upon it, as it checked the momentum of the mass of iron. He set the friction brake.

Thad flung himself flat, grasped the wire above the reel. Even if the mass of iron tore itself free, he could hold to the wire, and himself reach the ship.

He flung past the deserted vessel, behind it, his lump of iron swung like a pebble in a sling. A cloud of smoke burst from the burned lining of the friction brake, in the reel. Then the wire was all out; there was a sudden jerk.

And the hard-gathered sphere of metal was gone--snapped off into space. Thad clung desperately to the wire, muscles cracking, tortured arms almost drawn from their sockets. Fear flashed over his mind; what if the wire broke, and left him floating helpless in space?

It held, though, to his relief. He was trailing behind the ship. Eagerly he seized the handle of the reel; began to wind up the mile of thin wire. Half an hour later, Thad’s suited figure bumped gently against the shining hull of the rocket. He got to his feet, and gazed backward into the starry gulf, where his sphere of iron had long since vanished.

“Somebody is going to find himself a nice chunk of metal, all welded together and equipped for rocket navigation,” he murmured. “As for me--well, I’ve simply got to run this tub to Mars!”

He walked over the smooth, refulgent hull, held to it by magnetic soles. Nowhere was it broken, though he found scars where small meteoric particles had scratched the brilliant polish. So no meteor had wrecked the ship. What, then, was the matter? Soon he would know.

The Red Dragon was not large. A hundred and thirty feet long, Thad estimated, with a beam of twenty-five feet. But her trim lines bespoke design recent and good; the double ring of black projecting rockets at the stern told of unusual speed.

A pretty piece of salvage, he reflected, if he could land her on Mars. Half the value of such a ship, unharmed and safe in port, would be a larger sum than he dared put in figures. And he must take her in, now that he had lost his own rocket!

He found the life-tubes, six of them, slender, silvery cylinders, lying secure in their niches, three along each side of the flier. None was missing. So the crew had not willingly deserted the ship.

He approached the main air-lock, at the center of the hull, behind the projecting dome of the bridge. It was closed. A glance at the dials told him there was full air pressure within it. It had, then, last been used to enter the rocket, not to leave it.

Thad opened the exhaust valve, let the air hiss from the chamber of the lock. The huge door swung open in response to his hand upon the wheel, and he entered the cylindrical chamber. In a moment the door was closed behind him, air was hissing into the lock again.

He started to open the face-plate of his helmet, longing for a breath of air that did not smell of sweat and stale tobacco smoke, as that in his suit always did, despite the best chemical purifiers. Then he hesitated. Perhaps some deadly gas, from the combustion chambers...

Thad opened the inner valve, and came upon the upper deck of the vessel. A floor ran the full length of the ship, broken with hatches and companionways that gave to the rocket rooms, cargo holds, and quarters for crew and passengers below. There was an enclosed ladder that led to bridge and navigating room in the dome above. The hull formed an arched roof over it.

The deck was deserted, lit only by three dim blue globes, hanging from the curved roof. All seemed in order--the fire-fighting equipment hanging on the walls, and the huge metal patches and welding equipment for repairing breaks in the hull. Everything was clean, bright with polish or new paint.

And all was very still. The silence held a vague, brooding threat that frightened Thad, made him wish for a moment that he was back upon his rugged ball of metal. But he banished his fear, and strode down the deck.

Midway of it he found a dark stain upon the clean metal. The black of long-dried blood. A few tattered scraps of cloth beside it. No more than bloody rags. And a heavy meat cleaver, half hidden beneath a bit of darkened fabric.

Mute record of tragedy! Thad strove to read it. Had a man fought here and been killed? It must have been a struggle of peculiar violence, to judge by the dark spattered stains, and the indescribable condition of the remnants of clothing. But what had he fought? Another man, or some thing? And what had become of victor and vanquished?

He walked on down the deck.

The torturing silence was broken by the abrupt patter of quick little footsteps behind him. He turned quickly, nervously, with a hand going instinctively to his welding arc, which, he knew, would make a fairly effective weapon.

It was merely a dog. A little dog, yellow, nondescript, pathetically delighted. With a sharp, eager bark, it leaped up at Thad, pawing at his armor and licking it, standing on its hind legs and reaching toward the visor of his helmet.

It was very thin, as if from long starvation. Both ears were ragged and bloody, and there was a long, unhealed scratch across the shoulder, somewhat inflamed, but not a serious wound.

The bright, eager eyes were alight with joy. But Thad thought he saw fear in them. And even through the stiff fabric of the Osprey suit, he felt that the dog was trembling.

Suddenly, with a low whine, it shrank close to his side. And another sound reached Thad’s ears.

A cry, weird and harrowing beyond telling. A scream so thin and so high that it roughened his skin, so keenly shrill that it tortured his nerves; a sound of that peculiar frequency that is more agonizing than any bodily pain.

When silence came again, Thad was standing with his back against the wall, the welding arc in his hand. His face was cold with sweat, and a queer chill prickled up and down his spine. The yellow dog crouched whimpering against his legs.

Ominous, threatening stillness filled the ship again, disturbed only by the whimpers and frightened growls of the dog. Trying to calm his overwrought nerves, Thad listened--strained his ears. He could hear nothing. And he had no idea from which direction the terrifying sound had come.

A strange cry. Thad knew it had been born in no human throat. Nor in the throat of any animal he knew. It had carried an alien note that overcame him with instinctive fear and horror. What had voiced it? Was the ship haunted by some dread entity?

For many minutes Thad stood upon the deck, waiting, tensely grasping the welding tool. But the nerve-shattering scream did not come again. Nor any other sound. The yellow dog seemed half to forget its fear. It leaped up at his face again, with another short little bark.

The air must be good, he thought, if the dog could live in it.

He unscrewed the face-plate of his helmet, and lifted it. The air that struck his face was cool and clean. He breathed deeply, gratefully. And at first he did not notice the strange odor upon it: a curious, unpleasant scent, earthly, almost fetid, unfamiliar.

The dog kept leaping up, whining.

“Hungry, boy?” Thad whispered.

He fumbled in the bulky inside pockets of his suit, found a slab of concentrated food, and tossed it out through the opened panel. The dog sprang upon it, wolfed it eagerly, and came back to his side.

Thad set at once about exploring the ship.

First he ascended the ladder to the bridge. A metal dome covered it, studded with transparent ports. Charts and instruments were in order. And the room was vacant, heavy with the fatal silence of the ship.

Thad had no expert’s knowledge of the flier’s mechanism. But he had studied interplanetary navigation, to qualify for his license to carry masses of metal under rocket power through the space lanes and into planetary atmospheres. He was sure he could manage the ship if its mechanism were in good order, though he was uncertain of his ability to make any considerable repairs.

To his relief, a scrutiny of the dials revealed nothing wrong.

He started the gyro motors, got the great wheels to spinning, and thus stopped the slow, end-over-end turning of the flier. Then he went to the rocket controls, warmed three of the tubes, and set them to firing. The vessel answered readily to her helm. In a few minutes he had the red fleck of Mars over the bow.

“Yes, I can run her, all right,” he announced to the dog, which had followed him up the steps, keeping close to his feet. “Don’t worry, old boy. We’ll be eating a juicy beefsteak together, in a week. At Comet’s place in Helion, down by the canal. Not much style--but the eats!

“And now we’re going to do a little detective work, and find out what made that disagreeable noise. And what happened to all your fellow-astronauts. Better find out, before it happens to us!”

He shut off the rockets, and climbed down from the bridge again.

When Thad started down the companionway to the officers’ quarters, in the central one of the five main compartments of the ship, the dog kept close to his legs, growling, trembling, hackles lifted. Sensing the animal’s terror, pitying it for the naked fear in its eyes, Thad wondered what dramas of horror it might have seen.

The cabins of the navigator, calculator, chief technician, and first officer were empty, and forbidding with the ominous silence of the ship. They were neatly in order, and the berths had been made since they were used. But there was a large bloodstain, black and circular, on the floor of the calculator’s room.

The captain’s cabin held evidence of a violent struggle. The door had been broken in. Its fragments, with pieces of broken furniture, books, covers from the berth, and three service pistols, were scattered about in indescribable confusion, all stained with blood. Among the frightful debris, Thad found several scraps of clothing, of dissimilar fabrics. The guns were empty.

Attempting to reconstruct the action of the tragedy from those grim clues, he imagined that the five officers, aware of some peril, had gathered here, fought, and died.

The dog refused to enter the room. It stood at the door, looking anxiously after him, trembling and whimpering pitifully. Several times it sniffed the air and drew back, snarling. Thad thought that the unpleasant earthy odor he had noticed upon opening the face-plate of his helmet was stronger here.

After a few minutes of searching through the wildly disordered room, he found the ship’s log--or its remains. Many pages had been torn from the book, and the remainder, soaked with blood, formed a stiff black mass.

Only one legible entry did he find, that on a page torn from the book, which somehow had escaped destruction. Dated five months before, it gave the position of the vessel and her bearings--she was then just outside Jupiter’s orbit, Earthward bound--and concluded with a remark of sinister implications:

“Another man gone this morning. Simms, assistant technician. A fine workman. O’Deen swears he heard something moving on the deck. Cook thinks some of the doctor’s stuffed monstrosities have come to life. Ridiculous, of course. But what is one to think?”

Pondering the significance of those few lines, Thad climbed back to the deck. Was the ship haunted by some weird death, that had seized the crew man by man, mysteriously? That was the obvious implication. And if the flier had been still outside Jupiter’s orbit when those words were written, it must have been weeks before the end. A lurking, invisible death! The scream he had heard...

He descended into the forecastle, and came upon another such silent record of frightful carnage as he had found in the captain’s cabin. Dried blood, scraps of cloth, knives and other weapons. A fearful question was beginning to obsess him. What had become of the bodies of those who must have died in these conflicts? He dared not think the answer.

Gripping the welding arc, Thad approached the after hatch, giving to the cargo hold. Trepidation almost overpowered him, but he was determined to find the sinister menace of the ship, before it found him. The dog whimpered, hung back, and finally deserted him, contributing nothing to his peace of mind.

The hold proved to be dark. An indefinite black space, oppressive with the terrible silence of the flier. The air within it bore still more strongly the unpleasant fetor.

Thad hesitated on the steps. The hold was not inviting. But at the thought that he must sleep, unguarded, while taking the flier to Mars, his resolution returned. The uncertainty, the constant fear, would be unendurable.

He climbed on down, feeling for the light button. He found it, as his feet touched the floor. Blue light flooded the hold.

It was filled with monstrous things, colossal creatures, such as nothing that ever lived upon the Earth; like nothing known in the jungles of Venus or the deserts of Mars, or anything that has been found upon Jupiter’s moons.

They were monsters remotely resembling insects or crustaceans, but as large as horses or elephants; creatures upreared upon strange limbs, armed with hideously fanged jaws, cruel talons, frightful, saw-toothed snouts, and glittering scales, red and yellow and green. They leered at him with phosphorescent eyes, yellow and purple.

They cast grotesquely gigantic shadows in the blue light...

A cold shock of horror started along Thad’s spine, at sight of those incredible nightmare things. Automatically be flung up the welding tool, flicking over the lever with his thumb, so that violet electric flame played about the electrode.

Then he saw that the crowding, hideous things were motionless, that they stood upon wooden pedestals, that many of them were supported upon metal bars. They were dead. Mounted. Collected specimens of some alien life.

Grinning wanly, and conscious of a weakness in the knees, he muttered: “They sure will fill the museum, if everybody gets the kick out of them that I did. A little too realistic, I’d say. Guess these are the ‘stuffed monstrosities’ mentioned in the page out of the log. No wonder the cook was afraid of them. Some of then do look hellishly alive!”

He started across the hold, shrinking involuntarily from the armored enormities that seemed crouched to spring at him, motionless eyes staring.

So, at the end of the long space, he found the treasure.

Glittering in the blue light, it looked unreal. Incredible. A dazzling dream. He stopped among the fearful things that seemed gathered as if to guard it, and stared with wide eyes through the opened face-plate of his helmet.

He saw neat stacks of gold ingots, new, freshly smelted; bars of silver-white iridium, of argent platinum, of blue-white osmium. Many of them. Thousands of pounds, Thad knew. He trembled at thought of their value. Almost beyond calculation.

Then he saw the coffer, lying beyond the piled, gleaming ingots--a huge box, eight feet long; made of some crystal that glittered with snowy whiteness, filled with sparkling, iridescent gleams, and inlaid with strange designs, apparently in vermilion enamel.

With a little cry, he ran toward the chest, moving awkwardly in the loose, deflated fabric of the Osprey suit.

Beside the coffer, on the floor of the hold, was literally a mountain of flame--blazing gems, heaped as if they had been carelessly dumped from it; cut diamonds, incredibly gigantic; monster emeralds, sapphires, rubies; and strange stones, that Thad did not recognize.

And Thad gasped with horror, when he looked at the designs of the vermilion inlay, in the white, gleaming crystal. Weird forms. Shapes of creatures somewhat like gigantic spiders, and more unlike them. Demoniac things, wickedly fanged, jaws slavering. Executed with masterly skill, that made them seem living, menacing, secretly gloating!

Thad stared at them for long minutes, fascinated almost hypnotically. Three times he approached the chest, to lift the lid and find what it held. And three times the unutterable horror of those crimson images thrust him back, shuddering.