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  'I don't like that,' I said.

  'Don't interrupt, William. Let me finish. So far as I can tell from subsequent experiments, the brain is a peculiarly self-supporting object. It manufactures its own cerebrospinal fluid. The magic processes of thought and memory which go on inside it are manifestly not impaired by the absence of limbs or trunk or even of skull, provided, as I say, that you keep pumping in the right kind of oxygenated blood under the proper conditions.

  'My dear William, just think for a moment of your own brain. It is in perfect shape. It is crammed full of a lifetime of learning. It has taken you years of work to make it what it is. It is just beginning to give out some first-rate original ideas. Yet soon it is going to have to die along with the rest of your body simply because your silly little pancreas is lousy with cancer.'

  'No thank you,' I said to him. 'You can stop there. It's a repulsive idea, and even if you could do it, which I doubt, it would be quite pointless. What possible use is there in keeping my brain alive if I couldn't talk or see or hear or feel? Personally, I can think of nothing more unpleasant.'

  'I believe that you would be able to communicate with us,' Landy said. 'And we might even succeed in giving you a certain amount of vision. But let's take this slowly. I'll come to all that later on. The fact remains that you're going to die fairly soon whatever happens; and my plans would not involve touching you at all until after you are dead. Come now, William. No true philosopher could object to lending his dead body to the cause of science.'

  'That's not putting it quite straight,' I answered. 'It seems to me there'd be some doubt as to whether I were dead or alive by the time you'd finished with me.'

  'Well,' he said, smiling a little, 'I suppose you're right about that. But I don't think you ought to turn me down quite so quickly, before you know a bit more about it.'

  'I said I don't want to hear it.'

  'Have a cigarette,' he said, holding out his case.

  'I don't smoke, you know that.'

  He took one himself and lit it with a tiny silver lighter that was no bigger than a shilling piece. 'A present from the people who make my instruments,' he said. 'Ingenious, isn't it?'

  I examined the lighter, then handed it back.

  'May I go on?' he asked.

  'I'd rather you didn't.'

  'Just lie still and listen. I think you'll find it quite interesting.'

  There were some blue grapes on a plate beside my bed. I put the plate on my chest and began eating the grapes.

  'At the very moment of death,' Landy said, 'I should have to be standing by so that I could step in immediately and try to keep your brain alive.'

  'You mean leaving it in the head?'

  'To start with, yes. I'd have to.'

  'And where would you put it after that?'

  'If you want to know, in a sort of basin.'

  'Are you really serious about this?'

  'Certainly I'm serious.'

  'All right. Go on.'

  'I suppose you know that when the heart stops and the brain is deprived of fresh blood and oxygen, its tissues die very rapidly. Anything from four to six minutes and the whole thing's dead. Even after three minutes you may get a certain amount of damage. So I should have to work rapidly to prevent this from happening. But with the help of the machine, it should all be quite simple.'

  'What machine?'

  'The artificial heart. We've got a nice adaptation here of the one originally devised by Alexis Carrel and Lindbergh. It oxygenates the blood, keeps it at the right temperature, pumps it in at the right pressure, and does a number of other little necessary things. It's really not at all complicated.'

  'Tell me what you would do at the moment of death,' I said. 'What is the first thing you would do?'

  'Do you know anything about the vascular and venous arrangements of the brain?'

  'No.'

  'Then listen. It's not difficult. The blood supply to the brain is derived from two main sources, the internal carotid arteries and the vertebral arteries. There are two of each, making four arteries in all. Got that?'

  'Yes.'

  'And the return system is even simpler. The blood is drained away by only two large veins, the internal jugulars. So you have four arteries going up - they go up the neck, of course - and two veins coming down. Around the brain itself they naturally branch out into other channels, but those don't concern us. We never touch them.'

  'All right,' I said. 'Imagine that I've just died. Now what would you do?'

  'I should immediately open your neck and locate the four arteries, the carotids and the vertebrals. I should then perfuse them, which means that I'd stick a large hollow needle into each. These four needles would be connected by tubes to the artificial heart.

  'Then, working quickly, I would dissect out both the left and right internal jugular veins and hitch these also to the heart machine to complete the circuit. Now switch on the machine, which is already primed with the right type of blood, and there you are. The circulation through your brain would be restored.'

  'I'd be like that Russian dog.'

  'I don't think you would. For one thing, you'd certainly lose consciousness when you died, and I very much doubt whether you would come to again for quite a long time - if indeed you came to at all. But, conscious or not, you'd be in a rather interesting position, wouldn't you? You'd have a cold dead body and a living brain.'

  Landy paused to savour this delightful prospect. The man was so entranced and bemused by the whole idea that he evidently found it impossible to believe I might not be feeling the same way.

  'We could now afford to take our time,' he said. 'And believe me, we'd need it. The first thing we'd do would be to wheel you to the operating-room, accompanied of course by the machine, which must never stop pumping. The next problem ...'

  'All right,' I said. 'That's enough. I don't have to hear the details.'

  'Oh but you must,' he said. 'It is important that you should know precisely what is going to happen to you all the way through. You see, afterwards, when you regain consciousness, it will be much more satisfactory from your point of view if you are able to remember exactly where you are and how you came to be there. If only for your own peace of mind you should know that. You agree?'

  I lay still on the bed, watching him.

  'So the next problem would be to remove your brain, intact and undamaged, from your dead body. The body is useless. In fact it has already started to decay. The skull and the face are also useless. They are both encumbrances and I don't want them around. All I want is the brain, the clean beautiful brain, alive and perfect. So when I get you on the table I will take a saw, a small oscillating saw, and with this I shall proceed to remove the whole vault of your skull. You'd still be unconscious at that point so I wouldn't have to bother with anaesthetic.'

  'Like hell you wouldn't,' I said.

  'You'd be out cold, I promise you that, William. Don't forget you died just a few minutes before.'

  'Nobody's sawing off the top of my skull without an anaesthetic,' I said.

  Landy shrugged his shoulders. 'It makes no difference to me,' he said. 'I'll be glad to give you a little procaine if you want it. If it will make you any happier I'll infiltrate the whole scalp with procaine, the whole head, from the neck up.'

  'Thanks very much,' I said.

  'You know,' he went on, 'it's extraordinary what sometimes happens. Only last week a man was brought in unconscious, and I opened his head without any anaesthetic at all and removed a small blood clot. I was still working inside the skull when he woke up and began talking.

  ' "Where am I?" he asked.

  ' "You're in hospital."

  ' "Well." he said. "Fancy that."

  ' "Tell me," I asked him, "is this bothering you, what I'm doing?"

  ' "No," he answered. "Not at all. What are you doing?"

  ' "I'm just removing a blood clot from your brain."

  ' "You are?"

  ' "Just lie still. Don't move. I