"And then breathing began to get a bit hard for us--we'd been away from the ship over an hour--so we went back to the village to collect Lecky and take him to the ship. He was getting along so well that he hated to leave, but he was starting to pant, too, so we talked him into it. He was wearing one of the earrings, and said they'd given it to him as a present, and he'd made them a return present of a pocket slide-rule he happened to have with him. "'Why a slide-rule?' I asked him. 'Those things cost money and we've got plenty of junk that would make them happier.' "'That's what you think,' he said. 'They figured out how to multiply and divide with it almost as soon as I showed it to them. I showed them how to extract square roots, and I was starting on cube roots when you fellows came back.' "I whistled and took a close look to see if maybe he was kidding me. He didn't seem to be. But I noticed that he was walking strangely and--well, acting just a bit strangely, somehow, although I couldn't put my finger on what it was. I decided finally that he was just a bit over-excited. This was Lecky's first trip off Earth, so that was natural enough. "Inside the ship, as soon as Lecky got his breath back--the last hundred yards pretty well winded us--he started in to tell Haynes and Hilda Race about the Ganymedeans. Most of it was too technical for me, but I got that they had some strange contradictions in them. As far as their way of life was concerned, they were more primitive than Australian bushmen. But they had brains and a philosophy and a knowledge of mathematics and pure science. They'd told him some things about atomic structure that excited hell out of him. He was in a dither to get back to Earth where he could get at equipment to check some of those things. "And he said the earring was a sign of membership in the tribe--they'd acknowledged him as a friend and compatriot and what-not by giving it to him." Blake asked, "Was it gold?" "I'm coming to that," I told him. I was feeling cramped from sitting so long in one position on the bunk, and I stood up and stretched. There isn't much room to stretch in an asteroid tug and my hand hit against the pistol resting in the clips on the wall. I said, "What's the pistol for, Blake?" He shrugged. "Rules. Has to be one hand weapon on every space-craft. Heaven knows why, on an asteroid ship. Unless the council thinks some day an asteroid may get mad at us when we tow it out of orbit so it cracks up another. Say, did I ever tell you about the time we had a little twenty-ton rock in tow and--" "Shut up Blake," Charlie said. "He's just getting to those damn earrings." "Yeah, the earrings," I said. I took the pistol down from the wall and looked at it. It was an old-fashioned metal project weapon, twenty-shot, circa 2000. It was loaded and usable, but dirty. It hurts me to see a dirty gun.