it didn't feel pleasant, sensible or not.

There were no more shots for half an hour. But our tension mounted with the waiting.

Finally Klein said through his helmet phone: "Maybe Etl ought to go out and scout around now."

Etl was naturally the only one of us who had much chance for success.

"Go only if you really want to, Etl," Miller said. "It could be dangerous even for you."

But Etl had already put on his oxygen mask. Air hissed into his cage from the greater pressure outside as he turned a valve. Then he unlatched the cage-door. He wouldn't be harmed by the brief exposure to atmosphere of Earth-density while he moved to our rocket's airlock. Now he was getting around high on his tendrils. Like a true Martian.

He left his specially built pistol behind, according to plan. We had weapons, but we didn't mean to use them unless everything went dead wrong.

Etl's tendrils touched the dusty surface of Mars. A minute later, he disappeared behind some scrub growths. Then, for ten minutes, the pendant silence was heavy. It was broken by the sound of a shot, coming back to us thinly through the rarefied air.

"Maybe they got him," Craig said anxiously.

Nobody answered. I thought of an old story I'd read about a boy being brought up by wolves. His ways were so like an animal's that hunters had shot him. He had come back to civilization dead. Perhaps there was no other way.

By sundown, Etl had not returned. So three things seemed possible: He had been murdered. He had been captured. Or else he had deserted to his own kind. I began to wonder. What if we were complete fools? What if there were more than differences of body and background, plus the dread of newness, between Earthmen and Martians, preventing their friendship?

What if Martians were basically malevolent?

But speculation was useless now. We were committed to a line of action. We had to follow it through.

We ate a meager supper. The brief dusk changed to a night blazing with frigid stars. But the darkness on the ground remained until the jagged lump of light that was Phobos, the nearer moon, arose out of the 

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