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.

I

"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.

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