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