But during the first of our now infrequent meetings, he said to Craig and Klein and me: "When I go out to Mars, I'd like to keep my old bunch as crew. I need men I'm used to working with, those who understand the problems we're up against. I have a plan that makes sense. The trouble is, to join this expedition, a man has to be part damn-fool."

Klein chuckled. "I'll sell you some of mine."

I just nodded my way in. I'd never thought of backing out.

Craig grabbed Miller's hand and shook it.

Miller gave Etl a chance to say no. "You can stay on Earth if you want to, Etl."

But the creature said: "I have lived all my life with the idea of going, Miller. Thank you."

iller briefed us about his plan. Then he, Klein, Craig and I all took a lot of psych tests—trick questioning and so forth to reveal defects of conviction and control. But we were all pretty well indoctrinated and steady. Etl had taken so many tests already that, if there were any flaws still hidden in him, they would probably never be found.

Mars and Earth were approaching closer to each other again in their orbital positions. A month before takeoff time, Craig, Klein and I took Etl, in a small air-conditioned cage, to White Sands. The ship towered there, silvery, already completed. We knew its structure and the function of its machinery intimately from study of its blueprints. But our acquaintance with it had to be actual, too. So we went over it again and again, under Miller's tutelage.

Miller wrote a last message, to be handed to the newscast boys after our departure:

"If by Martian action, we fail to return, don't blame the Martians too quickly, because there is a difference and a doubt. Contact between worlds is worth more than the poison of a grudge...."

I said good-by to Alice and the kids, who had come out to see me off. I felt pretty punk. Maybe I was a stinker, going off like that. But, on the other hand, that wasn't entirely the right way to look at things, because Patty's and Ron's faces fairly glowed with pride for their pa. The tough part, then, was for Alice, who knew what it was all about. Yet she looked proud, too. And she didn't go damp.

"If it weren't for the kids, I'd be trying to go along, Louie," she told me. "Take care of yourself."

She knew that a guy has to do what's in his heart. I think that the basic and initial motive of exploration is that richest of human commodities—high romance. The metallic ores and other commercial stuff that get involved later are only cheap by-products. To make the dream of space travel a reality was one of our purposes. But to try to forestall the danger behind it was at least as important.

e blasted off in a rush of fire that must have knocked down some self-operating television cameras. We endured the strangling thrust of acceleration, and then the weightlessness of just coasting on our built-up velocity. We saw the stars and the black sky of space. We saw the Earth dwindle away behind us.

But the journey itself, though it lasted ninety days, was no real adventure—comparatively speaking. There was nothing unpredictable in it. Space conditions were known. We even knew about the tension of nostalgia. But we understood, too, the mental attitudes that could lessen the strain. Crossing space to another world under the tremendous power of atomic fusion, and under the precise guidance of mathematics and piloting devices, reduces the process almost to a formula. If things go right, you get where you're going; if not, there isn't much you can do. Anyway, we had the feeling that the technical side of interplanetary travel was the simplest part.

There is a marking near the Martian equator shaped like the funnel of a gigantic tornado. It is the red planet's most conspicuous feature and it includes probably the least arid territory of a cold, arid world. Syrtis Major, it is called. Astronomers had always supposed it to be an ancient sea-bottom. That was where our piloting devices were set to take us.

Over it, our retarding fore-jets blazed for the last time. Our retractable wings slid from their sockets and took hold of the thin atmosphere with a thump and a soft rustle. On great rubber-tired wheels, our ship—horizontal now, like a plane—landed in a broad valley that must have been cleared of boulders by Martian engineers countless ages before.

Our craft stopped rumbling. We peered from the windows of our cabin, saw the deep blue of the sky and the smaller but brilliant Sun. We saw little dusty whirlwinds, carven monoliths that were weathering away, strange blue-green vegetation, some of which we could recognize. To the east, a metal tower glinted. And a mile beyond it there was a tremendous flat structure. An expanse of glassy roof shone. What might have been a highway curved like a white ribbon into the distance.

The scene was quiet, beautiful and sad. You could feel that here maybe a hundred civilizations had risen, and had sunk back into the dust. Mars was no older than the Earth; but it was smaller, had cooled faster and must have borne life sooner. Perhaps some of those earlier cultures had achieved space travel. But, if so, it had been forgotten until recent years. Very soon now its result would be tested. The meeting of alien entity with alien entity was at hand.

I looked at Etl, still in his air-conditioned cage. His stalked eyes had a glow and they swayed nervously. Here was the home-planet that he had never seen. Was he eager or frightened, or both?

His education and experience were Earthly. He knew no more of Mars than we did. Yet, now that he was here and probably at home, did difference of physical structure and emotion make him feel that the rest of us were enemies, forever too different for friendly contact? My hide began to pucker.

igh in the sky, some kind of aircraft glistened. On the distant turnpike there were the shining specks of vehicles that vanished from sight behind a ridge shaggy with vegetation.

Miller had a tight, nervous smile. "Remember, men," he said. "Passivity. Three men can't afford to get into a fight with a whole planet."

We put on spacesuits, which we'd need if someone damaged our rocket. It had been known for years that Martian air was too thin and far too poor in oxygen for human lungs. Even Etl, in his cage, had an oxygen mask that Klein had made for him. We had provided him with this because the Martian atmosphere, drifting away through the ages, might be even leaner than the mixture we'd given Etl on Earth. That had been based on spectroscopic analyses at 40 to 60 million miles' distance, which isn't close enough for any certainty.

Now all we could do was wait and see what would happen. I know that some jerks, trying to make contact with the inhabitants of an unknown world, would just barge in and take over. Maybe they'd wave a few times and grin. If instead of being met like brothers, they were shot at, they'd be inclined to start shooting. If they got out alive, their hatred would be everlasting. We had more sense.

Yet passivity was a word that I didn't entirely like. It sounded spineless. The art of balancing naive trust exactly against hard cynicism, to try to produce something that makes a little sense, isn't always easy. Though we knew something of Martians, we didn't know nearly enough. Our plan might be wrong; we might turn out to be dead idiots in a short time. Still, it was the best thing that we could think of.

The afternoon wore on. With the dropping temperature, a