With Etl, it was even tougher. But at the end of that first year Miller had him pegged at about 120, judging him on the same basis as a five-year-old child. This score scared people a lot, because it seemed to hint at a race of super-beings.

But Miller wasn't jumping to conclusions. He pointed out to the reporters that Etl's kind seemed to grow up very rapidly; 120 was only twenty points above the norm--not uncommon among Earth youngsters, especially those from more gifted families. Etl seemed to have sprung from corresponding parentage, he said, for it seemed clear that they had been of the kind that does big things. They'd made a pioneering voyage across s.p.a.ce, hadn't they?

Etl could make chirps and squeaks and weird animal cries. Human speech, however, was beyond his vocal powers, though I knew that he could understand simple orders. He had a large tympanic membrane or "ear" on his ventral surface. Of course we wondered how his kind communicated with one another. The way he groped at my fingers with certain of his tentacles gave us a clue. There were tiny, nerve-like threads at their extremities. Seeing them prompted Miller to do something as brave as it was foolhardy.

He called in a surgeon and had a nerve in his arm bared. It must have hurt like the devil, but he let Etl clutch it with those thread-like members.

I was c.o.c.keyed enough to follow Miller's example and found out how much it really hurt. The idea was to establish a nerve channel, brain to brain, along which thoughts might pa.s.s. But nothing came through except a vague and restless questioning, mixed with the pain of our experiment.

"It doesn't work with us, Nolan," Miller said regretfully. "Our nervous systems aren't hooked up right for this sort of stunt, or Etl's nerve cells are too different from ours."

So we had to fall back on simpler methods of communication with Etl.

We tried teaching him sign language, but it didn't work too well, because tentacles aren't hands. Klein's inventive ability, plus some pointers from me about how Etl used his tendrils, finally solved the problem.

Klein made a cylindrical apparatus with a tonal buzzer, operated by electricity, at one end. It had dozens of stops and controls, their grips in the shape of tiny metal rings, along the sides of the cylinder.

First I had to learn a little about how to work that instrument with my big fingers. The trick was to mold the sounds of the buzzer, as human lips and tongue mold and shape tones of the vocal cords, so that they became syllables and words.

"h.e.l.l-oh-g-g-Et-t-l-l.... Chee-s-s-ee-whad-d I-ee got-t?"

It was tougher for me than learning to play a saxophone is for a boy of ten. And the noises were almost as bad.

I turned the apparatus over to Etl as soon as I could. Let him figure out how to use it. I'd just give him the words, the ideas. Of course he had to get educated, learn his cat, dog and rat, and his arithmetic, the same as a human kid, even if he was from another world. In a way, it was the law. You can't let a youngster, capable of learning, stay home from school.

And I was Etl's tutor. I thought what a crazy situation we had here; an ent.i.ty from one planet being brought up on another, without any real knowledge of his own folks, and unable to be very close to those ent.i.ties by whom he was being reared. It was strange and sad and a little comic.

For a while I thought I had a stammering parrot on my hands: "Hel-l-l-l-o ... h.e.l.l-oh-g-o ... N-n-ol-l-an-n-n ... h.e.l.l-lo-oh."

Etl never lost that habit of repet.i.tion. But he made progress in his studies.

"One, two, t'ree, fo', fibe, siss ... One time one ee one, toot time one ee two...."

Picture it the way it was--I, clad in a s.p.a.cesuit, crouching beside Etl in the cold, thin air inside that cage, tracing numbers and words in the dusty soil on the floor, while he read aloud with his voice tube or copied my words and figures with a sharp stick. Outside the transparent cage, the television cameras would be watching. And I would think that maybe in a way Etl was like Tarzan, being raised by apes.

Four more years went by. I had offspring of my own. Patty and Ron.

Good-looking, lovable brats. But Etl was my job--and maybe a little more than that.

At the end of two years, he stopped growing. He weighed fifty-two pounds and he was the ugliest-looking, elongated, gray-pink, leathery ovoid that you could imagine. But with his voice tube clutched in his tendrils, he could talk like a man.

He could take the finest watch, apart, repair and clean it in jig-time--and this was just one skill among scores. Toward the end of the four years, a Professor Jonas was coming in regularly and getting into a s.p.a.cesuit to give him lessons in physics, chemistry, college math, astronomy and biology. Etl was having his troubles with calculus.

And Etl could at least ape the outward aspects of the thoughts and feelings of men. There were things he said to me that were characteristic, though they came out of apparent sullenness that, for all I knew, had seeds of murder in it: "You're my pal, Nolan. Sort of my uncle. I won't say my father; you wouldn't like that."

Nice, embarra.s.sing sentiment, on the surface. Maybe it was just cool mimicry--a keen mind adding up human ways from observation of me and my kids, and making up something that sounded the same, without being the same at all. Yet somehow I hoped that Etl was sincere.

Almost from the building of the cage, of course, we'd kept photographs and drawings of Mars inside for Etl to see.

Hundreds of times I had said to him things like: "It's a ninety-nine and ninety-nine hundredths per cent probability that your race lives on that world, Etl. Before the ship that brought you crashed on Earth, we weren't at all sure that it was inhabited, and it's still an awful mystery. I guess maybe you'll want to go there. Maybe you'll help us make contact and establish amicable relations with the inhabitants--if there's any way we can do that."

During those five years, no more ships came to Earth from s.p.a.ce, as far as we knew. I guessed that the Martians understood how supremely hard it would be to make friendly contact between the peoples of two worlds that had always been separate. There was difference of form, and certainly difference of esthetic concepts. Of custom, nothing could be the same. We didn't have even an inkling of what the Martian civilization would be like.

One thing happened during the third year of Etl's existence. And his presence on Earth was responsible. Enough serious interest in s.p.a.ce travel was built up to overcome the human inertia that had counteracted the long-standing knowledge that such things were possible. A hydrogen-fusion reaction motor was built into a rocket, which was then hurled to the moon.

Miller went along, ostensibly to help establish the first Army experimental station there, but mostly to acquire the practical experience for a far longer leap.

In a way, I wished I could have gone, too; but, after all, the shadows in Etl's background were far more intriguing than the dead and airless craters and plains of the lunar surface.

Before Miller and the other moon-voyagers even returned, Detroit was busy forging, casting and machining the parts for a better, larger and much longer-range rocket, to be a.s.sembled in White Sands, New Mexico.

When Miller got back, he was too eager and busy to say much about the moon. For the next two and a half years, he was mostly out in White Sands.

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 d.a.m.n-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."

Miller 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 s.p.a.ce travel a reality was one of our purposes. But to try to forestall the danger behind it was at least as important.