Etl liked to work with those slender tendrils of his. The dexterity and speed with which he soon learned to build many things with a construction set seemed to prove a race background of perhaps ages of such activities. I made a tower or a bridge, while he watched. Then he was ready to try it on his own, using screwdrivers that Klein had made with special grips. Of course we tried dozens of intelligence tests on Etl, mostly of the puzzle variety, like fitting odd-shaped pieces of plastic together to form a sphere or a cube. He was hard to rate on any common human I.Q. scale. Even for an Earthian, an I.Q. rating is pretty much of a makeshift proposition. There are too many scattered factors that can't be touched. 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 space, 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 cockeyed 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 pass. 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.