"Why's that? All you had to do was paint the X and take off."

"Mister, I told you. I was drunk. I was falling down drunk, and when I saw I couldn't get at Jafe, and he was dead anyway, I came back in here and slept it off. Maybe if I'd been sober I would have taken the scooter and gone after him, but I was _drunk_."

"I see." And there just weren't any more questions I could think of to ask, not right now. So I said, "I've just had a shaky four-hour ride coming out here. Mind if I stick around a while before going back?"

"Help yourself," he said, in a pretty poor attempt at genial hospitality. "You can sleep over, if you want."

"Fine," I said. "I think I'd like that."

"You wouldn't happen to play cribbage, would you?" he asked, with the first real sign of animation I'd seen in him yet.

"I learn fast," I told him.

"Okay," he said. "I'll teach you." And he produced a filthy deck of cards and taught me.

After losing nine straight games of cribbage, I quit, and got to my feet. I was at my most casual as I stretched and said, "Okay if I wander around outside for a while? I've never been on an asteroid like this before. I mean, a little one like this. I've just been to the company cities up to now."

"Go right ahead," he said. "I've got some polishing and patching to do, anyway." He made his voice sound easy and innocent, but I noticed his eyes were alert and wary, watching me as I struggled back into my suit.

I didn't bother to put my shirt back on first, and that was a mistake.

The temperature inside an atmosphere suit is a steady sixty-eight degrees. That had never seemed particularly chilly before, but after the heat of that dome, it seemed cold as a blizzard inside the suit.

I went on out through the airlock, and moved as briskly as possible in the c.u.mbersome suit, while the sweat chilled on my back and face, and I accepted the glum conviction that one thing I was going to get out of this trip for sure was a nasty head cold.

I went over to the X first, and stood looking at it. It was just an X, that's all, shakily scrawled in yellow paint, with the initials "J-A"

scrawled much smaller beside it.

I left the X and clumped away. The horizon was practically at arm's length, so it didn't take long for the dome to be out of sight. And then I clumped more slowly, studying the surface of the asteroid.

What I was looking for was a grave. I believed that Karpin was lying, that he had murdered his partner. And I didn't believe that Jafe McCann's body had floated off into s.p.a.ce. I was convinced that his body was still somewhere on this asteroid. Karpin had been forced to concoct a story about the body being lost because the appearance of the body would prove somehow that it had been murder and not accident. I was convinced of that, and now all I had to do was prove it.

But that asteroid was a pretty unlikely place for a grave. That wasn't dirt I was walking on, it was rock, solid metallic rock. You don't dig a grave in solid rock, not with a shovel. You maybe can do it with dynamite, but that won't work too well if your object is to keep anybody from seeing that the hole has been made. Dirt can be patted down.

Blown-up rock looks like blown-up rock, and that's all there is to it.

I considered crevices and fissures in the surface, some cranny large enough for Karpin to have stuffed the body into. But I didn't find any of these either as I plodded along, being sure to keep one magnetted boot always in contact with the ground.

Karpin and McCann had set their dome up at just about the only really level spot on that entire planetoid. The rest of it was nothing but jagged rock, and it wasn't easy traveling at all, maneuvering around with magnets on my boots and a bulky atmosphere suit cramping my movements.

And then I stopped and looked out at s.p.a.ce and cursed myself for a ring-tailed baboon. McCann's body might be anywhere in the Solar System, anywhere at all, but there was one place I could be sure it wasn't, and that place was this asteroid. No, Karpin had not blown a grave or stuffed the body into a fissure in the ground. Why not? Because this chunk of rock was valuable, that's why not. Because Karpin was in the process of selling it to one of the major companies, and that company would come along and chop this chunk of rock to pieces, getting the valuable metal out, and McCann's body would turn up in the first week of operations if Karpin were stupid enough to bury it here.

Ten hours between McCann's death and Karpin's departure for Chemisant City. He'd admitted that already. And I was willing to bet he'd spent at least part of that time carrying McCann's body to some other asteroid, one he was sure was nothing but worthless rock. If that were true, it meant the mortal remains of Jafe McCann were now somewhere--_anywhere_--in the Asteroid Belt. Even if I a.s.sumed that the body had been hidden on an asteroid somewhere between here and Chemisant City--which wasn't necessarily so--that wouldn't help at all. The relative positions of planetoids in the Belt just keep on shifting. A small chunk of rock that was between here and Chemisant City a few weeks ago--it could be almost anywhere in the Belt right now.

The body, that was the main item. I'd more or less counted on finding it somehow. At the moment, I couldn't think of any other angle for attacking Karpin's story.

As I clopped morosely back to the dome, I nibbled at Karpin's story in my mind. For instance, why go to Chemisant City? It was closer, he said, but it couldn't have been closer by more than a couple of hours. The way I understood it, Karpin was well-known back on Atronics City--it was the normal base of operations for he and his partner--and he didn't know a soul at Chemisant City. Did it make sense for him to go somewhere he wasn't known after his partner's death, even if it _was_ an hour closer?

No, it made a lot more sense for a man in that situation to go where he's known, go someplace where he has friends who'll sympathize with him and help him over the shock of losing a partner of fifteen years'

standing, even if going there does mean traveling an hour longer.

And there was always the cash-return form. That was what I was here about in the first place. It just didn't make sense for McCann to have held up his celebration while he filled out a form that he wouldn't be able to mail until he got back to Atronics City. And yet the company's handwriting experts were convinced that it wasn't a forgery, and I could pretty well take their word for it.

Mulling these things over as I tramped back toward the dome, I suddenly heard a distant bell ringing way back in my head. The glimmering of an idea, not an idea yet but just the hint of one. I wasn't sure where it led, or even if it led anywhere at all, but I was going to find out.

Karpin opened the doors for me. By the time I'd stripped off the suit he was back to work. He was cleaning the single unit which was his combination stove and refrigerator and sink and garbage disposal.

I looked around the dome again, and I had to admit that a lot of ingenuity had gone into the manufacture and design of this dome and its contents. The dome itself, when deflated, folded down into an oblong box three feet by one foot by one foot. The lock itself, of course, folded separately, into another box somewhat smaller than that.

As for the gear inside the dome, it was functional and collapsible, and there wasn't a single item there that wasn't needed. There were the two chairs and the two cots and the table, all of them foldaway. There was that fantastic combination job Karpin was cleaning right now, and that had dimensions of four feet by three feet by three feet. The clutter of gear over to the left wasn't as much of a clutter as it looked. There was a Geiger counter, an automatic spectrograph, two atmosphere suits, a torsion densimeter, a core-cutting drill, a few small hammers and picks, two spare air tanks, boxes of food concentrate, a paint tube, a doorless jimmy-john and two small metal boxes about eight inches cube. These last were undoubtedly Karpin's and McCann's pouches, where they kept whatever letters, money, address books or other small bits of possessions they owned. Back of this mound of gear, against the wall, stood the air reconditioner, humming quietly to itself.

In this small enclosed s.p.a.ce there was everything a man needed to keep himself alive. Everything except human company. And if you didn't need human company, then you had everything. Just on the other side of that dome, there was a million miles of death, in a million possible ways. On this side of the dome, life was cozy, if somewhat Spartan and very hot.

I knew for sure I was going to get a head cold. My body had adjusted to the sixty-eight degrees inside the suit, finally, and now was very annoyed to find the temperature shooting up to ninety again.

Since Karpin didn't seem inclined to talk, and I would rather spend my time thinking than talking anyway, I took a hint from him and did some cleaning. I'd noticed a smeared spot about nose-level on the faceplate of my fishbowl, and now was as good a time as any to get rid of it. It had a tendency to make my eyes cross.

My shirt was sodden and wrinkled by this time anyway, having first been used to wipe sweat from my face and later been rolled into a ball and left on the chair when I went outside, so I used it for a cleaning rag, buffing like mad the silvered surface of the faceplate. Faceplates are silvered, not so the man inside can look out and no one else can look in, but in order to keep some of the more violent rays of the sun from getting through to the face.

I buffed for a while, and then I put the fishbowl on my head and looked through it. The spot was gone, so I went over and reattached it to the rest of the suit, and then settled back in my chair again and lit a cigarette.

Karpin spoke up. "Wish you wouldn't smoke. Makes it tough on the conditioner."

"Oh," I said. "Sorry." So I just sat, thinking morosely about non-forged cash-return forms, and coincidences, and likely spots to hide a body in the Asteroid Belt.

Where would one dispose of a body in the asteroids? I went back through my thinking on that topic, and I found holes big enough to drive Karpin's claim through. This idea of leaving the body on some worthless chunk of rock, for instance. If Karpin had killed his partner--and I was dead sure he had--he'd planned it carefully and he wouldn't be leaving anything to chance. Now, an asteroid isn't worthless to a prospector until that prospector has landed on it and tested it. _Karpin_ might know that such-and-such an asteroid was nothing but worthless stone, but the guy who stops there and finds McCann's body might _not_ know it.

No, Karpin wouldn't leave that to chance. He would get rid of that body, and he would do it in such a way that n.o.body would _ever_ find it.

How? Not by leaving it on a worthless asteroid, and not by just pushing it off into s.p.a.ce. The distance between asteroids is large, but so's the travel. McCann's body, floating around in the blackness, might just be found by somebody.

And that, so far as I could see, eliminated the possibilities. McCann's body was in the Belt. I'd eliminated both the asteroids themselves and the s.p.a.ce around the asteroids as hiding places. What was left?

The sun, of course.

I thought that over for a while, rather surprised at myself for having noticed the possibility. Now, let's say Karpin attaches a small rocket to McCann's body, stuffed into its atmosphere suit. He sets the rocket going, and off goes McCann. Not that he aims it toward the sun, that wouldn't work well at all. Instead of falling into the sun, the body would simply take up a long elliptical orbit _around_ the sun, and would come back to the asteroids every few hundred years. No, he would aim McCann _back_, in the direction opposite to the direction or rotation of the asteroids. He would, in essence, slow McCann's body down, make it practically stop in relation to the motion of the asteroids. And then it would simply _fall_ into the sun.

None of my ideas, it seemed, were happy ones. If McCann's body were even at this moment falling toward the sun, it was just as useful to me as if it were on some other asteroid.

But, wait a second. Karpin and McCann had worked with the minimum of equipment, I'd already noticed that. They didn't have extras of anything, and they certainly wouldn't have extra rockets. Except for one fast trip to Chemisant City--when he had neither the time nor the excuse to buy a jato rocket--Karpin had spent all of his time since McCann's death right here on this planetoid.

So that killed that idea.

While I was hunting around for some other idea, Karpin spoke up again, for the first time in maybe twenty minutes. "You think I killed him, don't you?" he said, not looking around from his cleaning job.