It was all one room, roughly circular, with a diameter of about fifteen feet. The sides went straight up for the first seven feet, then curved gradually inward to form the roof. At the center of the dome, the ceiling was about twelve feet high. The floor of the room was simply the asteroidal rock surface, not completely level and smooth. There were two chairs and a table to the right of the entry lock, two foldaway cots around the wall beyond them, the kitchen area next and a cluttered storage area around on the other side. There was a heater standing alone in the center of the room, but it certainly wasn't needed now. Sweat was already trickling down the back of my neck and down my forehead into my eyebrows. I peeled off my shirt and used it to wipe sweat from my face. "Warm in here," I said. "You get used to it," he muttered, which I found hard to believe. He brought over the coffee, and I tasted it. It was rotten, as bitter as this old hermit's soul, but I said, "Good coffee. Thanks a lot." "I like it strong," he said. I looked around at the room again. "All the comforts of home, eh? Pretty ingenious arrangement." "Sure," he said sourly. "How about getting to the point, Mister?" There's only one way to handle a blunt old man. Be blunt right back. "I'll tell you how it is," I said. "The company isn't accusing you of anything, but it has to be sure everything's on the up and up before it pays out any ten thousand credits. And your partner just happening to fill out that cash-return form just before he died--well, you've got to admit it is a funny kind of coincidence." "How so?" He slurped coffee, and glowered at me over the cup. "We made this strike here," he said. "We knew it was the big one. Jafe had that insurance policy of his in case he never did make the big strike. As soon as we knew this was the big one, he said, 'I guess I don't need that retirement now,' and sat right down and wrote out the cash-return. Then we opened a bottle of liquor and celebrated, and he got himself killed." The way Karpin said it, it sounded smooth and natural. _Too_ smooth and natural. "How did this accident happen anyway?" I asked him. "I'm not one hundred per cent sure of that myself," he said. "I was pretty well drunk myself by that time. But he put on his suit and said he was going out to paint the X. He was falling all over himself, and I tried to tell him it could wait till we'd had some sleep, but he wouldn't pay any attention to me." "So he went out," I said. He nodded. "He went out first. After a couple minutes, I got lonesome in here, so I suited up and went out after him. It happened just as I was going out the lock, and I just barely got a glimpse of what happened." * * * He attacked the coffee again, noisily, and I prompted him, saying, "What did happen, Mister Karpin?"