'That thing we're heading toward,' he said, before I could frame a fresh question of my own. 'That's your Ghostwheel, isn't it?'
'Yes.'
He laughed. Then: 'So you were telling the truth back in Santa Fe when you told me it required a peculiar environment. What you didn't say was that you'd found that environment and built the thing there.'
I nodded. 'What about your plans for a company?' I asked him.
'That was just to get you to talk about it.'
'And what about Dan Martinez-the things he said?'
'I don't know. I really didn't know him. I still don't know what he wanted, or why he came at us shooting.'
'Luke, what is it that you want, anyhow?'
'Right now I just want to see that damned thing,' he said. 'Did building it out here in the boonies endow it with some sort of special properties?'
'Yes.'
'Like what?'
'Like a few I didn't even think of - unfortunately,' I answered.
'Name one.'
'Sorry,' I said. 'Question and answer is a two-way game.'
'Hey, I'm the guy who just pulled you out of a hole in the ground.'
'I gather you're also the guy who tried to kill me on a bunch of April thirtieths.'
'Not recently,' he said. 'Honest.'
'You mean you really did?'
'Well . . . yeah. But I had reasons. It's a long story and-'
'Jesus, Luke! Why? What did I ever do to you?'
'It's not that simple,' he answered.
We reached the base of the nearest hill and he started climbing it.
'Don't,' I called to him. 'You can't go over.'
He halted.
'Why not?'
'The atmosphere ends thirty or forty feet up.'
'You're kidding.'
I shook my head.
'And it's worse on the other side,' I added. 'We have to find a passage through. There's one farther to the left.'
I turned and headed in that direction. Shortly, I heard his footfalls.
'So you gave it your voice,' he said.
'So?'
'So I see what you're up to and what's been going on. It's become sentient in that crazy place you built it. It went wild, and you're heading to shut it down. It knows it and it's got the power to do something about it. It's your Ghostwheel that's been trying to get you to turn back, isn't it?'
'Probably '
'Why didn't you just trump in?'
'You can't construct a Trump for a place that keeps changing. What do you know about Trumps, anyway?'
'Enough,' he said.
I saw the passage I was seeking up ahead.
I approached the place and I halted before I entered it.
'Luke,' I said, 'I don't know what you want or why or how you got here, and you don't seem to care to tell me. I will tell you something for free, though. This could be very dangerous. Maybe you ought to go back to wherever you came from and let me handle it. There's no reason to place you in jeopardy.'
'I think there is,' he said. 'Besides, I might be useful.'
'How?'
He shrugged.
'Let's get on with it, Merlin. I want to see that thing.'
'Okay. Come on.'
I led the way into the narrow place where the stone had been riven.
CHAPTER, 10
The passage was long and dark and occasionally tight, growing progressively colder as we advanced, but at length we emerged onto the wide, rocky shelf that faced the steaming pit. There was an ammonia-like odor in the air, and my feet were cold and my face flushed, as usual. I blinked hard several times, studying the latest outlines of the maze through the shifting mist. A pearl-gray pall hung over the entire area. Intermittent orange flashes penetrated the gloom.
'Uh-where is it?' Luke inquired.
I gestured straight ahead, toward the site of the latest flicker.
'Out there,' I told him.
Just then, the mists were swept away, revealing isle upon isle of dark, smooth ridges separated by black declivities. The ridges zigged and zagged their way out toward a fortress-like island, a low wall running about it, several metallic structures visible beyond.
'It's a maze,' he remarked. 'Do we travel it down in the passages or up on top of the walls?'
I smiled as he studied it.
'It varies,' I said. 'Sometimes up and sometimes down.'
'Well, which way do we go?'
'I don't know yet. I have to study it each time. You see, it keeps changing, and there's a trick to it.'
'A trick?' ,.
'Mere than one, actually. The whole damn thing is floating on a lake of liquid hydrogen and helium. The maze moves around. It's different each time. And then there's a matter of the atmosphere. If you were to walk upright along the ridges you would be above it in most places. You wouldn't last long. And the temperature ranges from horribly cold to roasting hot over a range of a few feet in elevation. You have to know when to crawl and when to climb and when to do other things - as well as which way to go.'
'How do you tell?'
'Un-uh,' I said. 'I'll take you in, but I'm not giving you the secret.'
The mists began to rise again from the depths and to collect into small clouds.
'I see now why you can't make a Trump for it,' he began.
I continued to study the layout.
'All right,' I said then. 'This way.'
'What if it attacks us while we're in the maze?' he asked.
'You can stay behind if you want.'
'No. Are you really going to shut it down?'
'I'm not sure. Come on.'
I took several steps ahead and to the right. A faint circle of light appeared in the air before me; grew brighter. I felt Luke's hand upon my shoulder.
'What-?' he began.
