"I'm glad to think I was keeping good company. Here, you'd better take one of these."

He handed me a thin, clear badge. I examined itaa simple radiation token, crude in that it could only tell you if you'd been exposed, rather than how bad your condition was.

"Vincent, you seem far too sophisticated to be building nukes for the Soviets," I tutted. "What is your arrangement, precisely?"

"Oh, I build nukes," he said, airily pulling back a lock on a metal door the size of a small castle. "But I'm very careful to ensure that clever men don't reach their full potential, and minor errors of manufacturing are introduced into the final process so, when the device goes up, it can do so on a historical schedule. I'm sure even the Cronus Club would notice a shift in the global arms race."

"And no one asks any questions?"

"As I said," he replied brightly, "remarkable system the Soviets have."

The door, during all this, had been sliding back with glacial sluggishness. Now it stood open, and Vincent stepped into a cavern of iron and electricity. All the trunking in the building seemed to converge here, and the air was notably warmer than in the gloomy corridors which had led down to this depth. Fans greater than the propellors on the Titanic whirred and hummed, and at the centre of all this stood a monolith of a machine. Where the Americans might have attempted to dress up their creation, Vincent and his team had gone for pure, practical functionality, parts welded together by brute force, the innards hanging exposed, cables labelled with white tape and pen, the only lights flashing those which actually, desperately, urgently needed to flash. It looked like the DIY class of a technological god who had run out of heat shrink tubing even before he'd begun. Men and women in little white badges scurried beneath the hulking shadow of this creature, dragging ladders across the floor to climb up to some unseen access port high above its warping pyramid base.

"What do you think?" asked Vincent brightly.

I felt the weight of the gun in my pocket and replied as calmly as I could, "That rather depends on what I'm looking at."

"Harry," he chided, "you disappoint me."

His disappointment was an invitation for deduction. Reluctantly, I deduced. "All right." I sighed. "You're clearly operating solid-state computing of a kind that won't be invented for a good fifteen years; over there I can see liquid cooling units which again I doubt will come into use for another seventeen years. The radiation badges combined with the lead-lined walls everywhere imply a radiation source, but you're clearly not running reactors as there's not enough water nearby for you to cool the systemaunless, that is, your reactor technology is more than fifty years ahead of the time?"

"No reactors," he agreed. "But you're correct as to the radioactive source."

"Criticality is a concern," I went on, "but not a big enough one for you to have men in hazard suits running around. The large amount of networking coming off the machine suggests you're feeding data out as well as energy in; that implies experiments which are being monitored rather than a fully fledged manufacturing process. In conclusion... you're studying something, probably sub-atomic, using technology decades ahead of its time, in a secret base in the middle of the USSR, andathis is what continues to baffle meayou seem pleased at this precise situation."

Indeed, he was beaming proudly at his machine. "Of course I'm pleased, Harry," he said. "With the insights we glean from this machine, we can change everything."

"Everything?"

"Everything," he repeated, and by the look in his eye I actually thought he might mean it. "Would you like to help?"

"Help?"

"Help," he parroted, "being a deed that is the opposite of hinder?"

"Even were this entire enterprise not in violation of everything the Club stands fora" a rolling raspberry noise was made at this suggestion "aI really don't know what it is I'd be helping with."

He put his arm over my shoulder, hugged me to his side like a long-lost friend. Was this the man who, so many centuries ago, had kissed Frances by the lawns and punched me to the floor for being kalachakra? "Harry," he said firmly, "what would you say to building a quantum mirror?"

Chapter 48.

"A quantum mirror-" he began.

"Phooey," I replied.

"A quantum mirror-"

"Claptrap."

"A quantum mirror!" Vincent was getting annoyed, worked up, the way he so often did during our talks.

Cambridge again.

Memories again.

It seems to me that in the course of my knowing Vincent my mind always turns back to the good times, to the days before complexity, before the end of the world.

"Are you quite ready to listen?" he demanded.

"Pass me another slice of chicken and some mashed potato, and I'll sit in silence and even prepare my best expression of interest for the moment," I replied.

He duly topped up my plate with a healthy portion of chicken and an obscene quantity of mash. "A quantum mirror," he tried again, "being a theoretical device for the extrapolation of matter."

"When you say extrapolation-"

"I thought you were going to be silent? Eat your food."

"I'm eating," I replied, pointedly forking in a mouthful of potato.

"Consider Darwin." I managed not to make a spluttering sound, and my effort itself earned me a glare. "He journeys to islands cut off from the rest of the planet and observes creatures and their patterns of living. These sights have been seen before, these sights will be seen again, but for Darwin, observing the world around him, they are the beginnings of a logical extrapolation. Observe, he says, how creatures adapt to their environments. Marvel at the bird which dives so perfectly off the rock to fish for its prey; see how similar it is to another animal thousands of miles away which could well be of the same species, except that its prey lives in caves and so it develops a long beak. Observe a worm, observe an insect, observe the crawling of a crab along an ocean floor, and from all thisa"

"Pass the gravy," I grunted.

The gravy was passed without missing a beat. "aand from all this there comes the most marvellous of theoriesaa theory of evolution. Extrapolation, Harry. From the smallest thing, great wonders are exposed. Now we as physicists-"

"I'm a physicist; you're still a student, and I don't know why I tolerate your company."

"As physicists," he ploughed on, "weamy recipe for gravy is superior to yoursaaren't looking at animals or the behaviour of birds; our material, the matter we observe, is in the atom itself. What if we can take this single, simplest of things, and put it to the same process that Darwin did? From a proton, a neutron and an electron we can deduce the forces which bind them together, which must therefore bind the universe together, bind space together, bind time together, and hold up a mirror, as it were, to the nature of existence itself..."

"A quantum mirror!" I concluded, waggling my fork melodramatically. "Vincent," I added, before his indignation could overwhelm mine, "that's precisely what science does."

"It's what it aims to achieve," he corrected, "but the tools we're limited toathree-dimensional objects which we can perceive within the visible spectrum, the human brain itselfaare utterly insufficient to the task. What we need is an entirely different tool for the understanding of matter, an entirely different way of comprehending the very building blocks of reality, from which comprehension the whole universe may unfold. What do you think?"

I thought about it.

"I think it's claptrap," I said at last.

"Harry-"

"No, wait, stick with me. Leaving aside the theoretical complications, the economic difficulties, the scientific problems, I think it's claptrap from an entirely philosophical point of view, one which will make you suitably angry because of its unscientific nature. I don't think, Vincent, that the human race has the capacity to fully comprehend the whole universe."

"Oh, but please-"

"Wait, wait just a moment! I think what you describeathis entirely impossible device, may I addawhich will, through some method I cannot begin to guess at, explode our understanding of the universe and create a theory of everything capable of answering every question starting with how and finishing up with the far more difficult why, this... miraculous device, is nothing more and nothing less than a do-it-yourself deity. You want to build yourself a machine for omnipotence, Vincent? You want to make yourself God?"

"Not me, God, not me..."

"To know all that is, all that was, all that could be-"

"The purpose of science! A gun is only a gun, it's men who misuse it..."

"That's all right then. Bring on omnipotence for the human race!"

" 'God' is such a weighted term..."

"You're right," I snapped, harder than I'd meant. "Call it a quantum mirror and no one will even begin to suspect the scale of your ambition."

"Maybe that's it," he replied with a shrug. "Maybe all God ever was was a quantum mirror."

Chapter 49.

I said, "Can I have some time to think?"

"Of course," he replied airily.

"Do you mind if I keep the gun?" I added.

"Of course not. If you don't mind, would you be comfortable waiting in a cell?" he asked. "There's a lot of sensitive equipment down here which you might get blood on, should you choose to blow your brains out."

"That would be frustrating," I agreed. "Lead the way."

They led me to a couple of cells. I supposed that no good secret research station was complete without them. They were cold, the beds concrete set into the wall. Vincent promised someone would bring blankets, and he was as good as his word. A hot thick soup with dumplings was also provided. The guard pushed everything nervously across the floor to me, his eye still fixed on the gun at my side. I smiled nicely at him and said not a word.

A quantum mirror.

Vincent RankisaVitali Karpenkoawhatever his name wasawas actually attempting to build a quantum mirror.

All of time and space, all that was or could be, laid out before you like the map of creation. A machine which could, from a single atom, extrapolate the wonders of the universe.

Explain how we came to be.

Why we came to be.

Even us, even the kalachakra.

I sat and thought.

Thought about Cambridge and our arguments over roast chicken.

About Akinleye pushing the needle under my skin.

Richard Lisle, shot in the chest before he could commit his crimes.

Lizzy, who I had loved, and Jenny, who I had loved in a completely different way, no less honestly, no more truly. Crawling at Phearson's feet; Virginia at my doorathe femoral artery is best, such a gusheraRory Hulne at my grandmother's funeral, and the look on my father's face as I left him to die. Standing by Harriet's graveside again and again, life after life, a child unable to take the hand of my foster-father, Patrick August, who would wither away inside, even as his body lived on.

What is the point of you?

The world is ending.

Now it's up to you.

Did she scream?

It's your past, Harry. It's your past.

Are you God, Dr August? Are you the only living creature that matters? Do you think, because you remember it, that your pain is bigger and more important? Do you think, because you experience it, that your life is the only life that gets counted?

That's all right then! Bring on omnipotence for the human race!

What is the point of you?

Are you God?

Apparently I thought for nearly a day.

When I'd done, I banged on the cell door. The same nervous guard who'd left the dumplings opened it, eyes flickering to the gun in my hand.

"Hello," I said, passing him the weapon. "Tell Karpenko yes. My answer is yes."

Chapter 50.

I once met a kalachakra by the name of Fidel Gussman. It was 1973; I was in Afghanistan to see the great Buddhas before the Taliban came to power and destroyed them. I was travelling as a New Zealand national, one of the easier passports to move about with, and trying to brush up my Pashto in the process. I was fifty-five years old and had spent a good deal of my life hunting down messages left in stone by previous members of the Cronus Club. It was a running gameaa joke left from AD 45 for future Club members which, if I could disinter, I would add my name to before burying in a new place, leaving behind a new set of suitably cryptic clues for future generations to solveaa sort of international time capsule for the overly bored. If feeling generous, participants also buried hidden treasures of a non-biodegradable kind. By far the most magnanimous contribution to the hunt had been a hitherto lost work of Leonardo da Vinci buried by a kalachakra from Renaissance Italy in a sealed jug of wine beneath a shrine to Santa Angelica in the highest part of the Alps. The helpful clues left behind had almost entirely been in the form of lewd rhymes, making the eventual discovery of the bequeathed artefact something of a treat. These games, more than anything else, took me round the world, and it was while visiting the Buddhas of Afghanistan that Fidel Gussman came calling.

You could see him approach from a mile offaa great man with a swollen neck riding on the roof of one of a convoy of trucks which kicked up yellow dust higher than their bobbing radio aerials. The people of the village scattered when he came into town, fearing bandits, and indeed bandits are precisely what they looked like. I made no attempt to hideaa fair-skinned New Zealander in the middle of Afghanistan doesn't have many places to go to groundaand stared down this European-faced arrival and his multinational convoy of AK-toting men as a tourist might stare at an obstructive police officer.