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.