So we all got up and gaggled after him, out of the room, down a tunnel, onto the down-cable of a dropshaft and past the guards -- maybe the same ones who had chased me away the night before. This time they just nodded to the instructor and watched us go past. We wound up in a long, wide, low-ceilinged passage with about a dozen squared-off and stained metal cylinders sticking up out of the floor. They looked like charred tree stumps, and it was a moment before I realized what they were.

I gulped.

"They're ships," I whispered to Sheri, louder than I intended. A couple of people looked at me curiously. One of them, I noticed, was a girl I had danced with the night before, the one with the dense black eyebrows. She nodded to me and smiled; I saw the bangles on her arm, and wondered what she was doing there -- and how she had done at the gambling tables.

The instructor gathered us around him, and said, "As someone just said, these are Heechee ships. The lander part. This is the piece you go down to a planet in, if you're lucky enough to find a planet. They don't look very big, but five people can fit into each of those garbage cans you see. Not comfortably, exactly. But they can. Generally speaking, of course, you'll always leave one person in the main ship, so there'll be at most four in the lander."

He led us past the nearest of them, and we all satisfied the impulse to touch, scratch, or pat it. Then he began to lecture:

"There were nine hundred and twenty-four of these ships docked at Gateway when it was first explored. About two hundred, so far, have proved nonoperational. Mostly we don't know why; they just don't work. Three hundred and four have actually been sent out on at least one trip. Thirty-three of those are here now, and available for prospecting trips. The others haven't been tried yet." He hiked himself up on the stumpy cylinder and sat there while he went on:

"One thing you have to decide is whether you want to take one of the thirty-three tested ones or one of the ones that has never been flown. By human beings, I mean. There you just pay your money and take your choice. It's a gamble either way. A high proportion of the trips that didn't come back were in first flights, so there's obviously some risk there. Well, that figures, doesn't it? After all, nobody has done any maintenance on them for God knows how long, since the Heechee put them there.

"On the other hand, there's a risk in the ones that have been out and back safely, too. There's no such thing as perpetual motion. We think some of the no-returns have been because the ships ran out of fuel. Trouble is, we don't know what the fuel is, or how much there is, or how to tell when a ship is about to run out."