'I can't pretend to understand probability math. But if the universe is so ordered, so - immutable - that the future can be told from a handful of numbers, then why need we go on living?'

Joan stood up, crossed to the wardrobe, and took out of it a waist-length white wig.

'It's obvious you do not understand p-math, then,' she said. 'We go on because to live is still better than to die. That has always been the choice of Humanity, even when we thought the future was a cauldron of possibilities.'

She combed out the wig. 'We cannot be certain how he will die,' she continued, 'You or I, perhaps, may be the ones the Institute chooses to—'

Korodore spun round. 'I have checked us all by deep-reach, RGD—'

'Oh, Korodore! I'm sorry. But you have such a touching faith in cause-and-effect! Don't you know that in an infinite Totality all universes will happen? There is a universe somewhere where at this moment you will turn into a—'

'Such things are said, madam,' he muttered.

'You disapprove of me,' she said, and pouted.

He raised his eyes to the gold century disc on her forehead and smiled thinly.

'Now, you are too old, madam, to try wiles of that kind. But I do disapprove. This meddling is not a good thing. It stinks of magic, witchcraft.'

'I haven't studied the pre-Sadhimist religions in any great depth, Korodore.'

'All right, madam. What happens if Dom doesn't die ? '

'It's unthinkable. This is the datum universe - he'll die. In a sense, the whole universe depends on the fact. If he didn't die, perhaps he'd discover the jokers world and that could be terrible.'

'And if he doesn't?'

Joan adjusted the wig and opened the window looking out over the sea. The fishing fleet was coming in with the tide, lit by the hanging pinpoint of Widdershins' blue sun. On the horizon the light glinted sharply off the Tower in the marshes.

'It's too hot to sleep,' she said, 'I'll finish this, and then I'll go down to the jetty.'

'Mystic law of the universe?' asked Korodore, as she reopened the book.

'They are the household accounts, sir,' she said sharply, 'A great comfort in times of trial.'

She wondered why she had never dismissed the man as security chief, and the answers queued up in her mind, ranging from his proven efficiency to the mitigating circumstance that he was Earth-born. Perhaps there were many other reasons.

As he turned to go she called him back.

'With regard to your question about Dom,' she said, 'In all humility, p-math is a young art. I doubt if there is anyone adept enough to know. Even the Institute doesn't know everything.'

'Dom might. His tutor says he is showing a disconcerting insight. Oh, I don't question your reasoning. If it is inevitable, perhaps it is better he shouldn't know. You can see he is the type the Institute hunts down.'

'You see, we can't answer all the questions.'

He shrugged. 'Perhaps you are asking the wrong questions.'

PROBABILITY MATH:

'As with the first Theory of Relativity and the Sadhimist One Commandment, so the nine equations of probability math provide an example of a deceptively simple spark initiating a great explosion of social change.

' "Probability math predicts the future." So says the half-educated man. A thousand years ago he would have mouthed "E equals MC squared" and believed he had encompassed the soaring castle of mathematical imagination . . .

'Probability math arises from the premise that we dwell in a truly infinite totality, space and time without limit, worlds without end - a creation so vast that what we are pleased to call our cause-and-effect datum Universe is a mere circle of candle-light. In such a totality we can only echo the words of Quixote: All things are possible...'

'... vindicated with the predicted discovery of the Internal Planets of Protostar Five. Then humanity could be sure - even from this tiny grain of proof. On either "side" were ranged the alternate Universes, uncounted millions differing perhaps by the orbit of an electron. Further, the difference must be greater - until in the looming shadows on the edge of imagination came the universes that had never known time, stars, space or rationality. What p-math did was quantify the possible time-lines of our datum universe. It did much more than that, however. Perhaps it brought back the essence of science from the days when it was half an art, when Creation was seen as a marvellous, carefully regulated clock - with all parts harmonizing to make the whole...'

'... As Sub-Lunar pointed out in those early years, p-math depended on a certain innate mental agility. Many superb practitioners were also incurably insane, possibly because of that very fact. Leaving aside that very special sub-group to which Sub-Lunar himself belonged - I say no more - the rest were usually highly educated and, in a word, lucky. (Luck being a function of the p-math talent, of course.) Many of them worked for the Joker Institute.

'Such a streak ran through the Sabalos family of Widdershins. For those of you who do not know the world, it is...'

'... just before the birth of his son and his own assassination in the marshes, John III predicted that the boy would die also on the day of his investiture as Chairman of the Planetary Board. The chance of this not happening was so remote as to make a billion-to-one long shot appear a fifty-fifty bet. Yes? I'm sorry. Perhaps I should explain.

'Suppose p-math had not been discovered. Now, on Earth there was a creature called a horse. Long ago it was realized that if a number of these animals were raced over a set distance one must surely prove faster than the others, and from this there was...'

'... back to the subject in hand. One anomaly in p-math concerned the Jokers, those semi-mythical beings who had left artifacts strewn around half the galaxy. Solid artifacts, indeed, most of them gigantic. According to probability math, the builders of these latter-day tourist attractions had never, ever existed...'

His Furness Dr CrAarg + 458°, in an informal lecture to students at Dis university, A.S. 5,201

Dom woke early, and spent a long time staring at the familiar ceiling paintings of his dome. They had been done by his great-grandfather, in gaudy blues and greens, and depicted a trio of overmuscled fishermen battling an enraged dagon. That was a slander on the dagons, Dom knew: they lacked a nervous system and it was doubtful if they ever thought. They just reacted.

The little swamp ig was sitting in the handbasin. It had managed to turn on one of the taps with its disconcertingly human forepaws, and was enjoying the trickle of water. When it saw he was awake it made a noise like a fingernail being dragged across glass. The smuggler had said it was a sign of happiness.

'Intelligent little thing, aren't you?' said Dom, switching off the warm air field and swinging himself off the bed.

He saw the clothes laid out neatly on the stand, and bit his lip. The swamp ig, a neatly healed scar on his chest and a few painful memories of his interview with Korodore were all that remained of yesterday.

Planetary Chairman. He'd own three per cent of the pilac industry, but on Sadhimist terms, and if you were a Sadhimist and rich you worked heavily to obscure the fact. He'd preside over innumerable committee meetings, and once a year would give the traditional annual report at the traditional Annual General Meeting. And that would be written for him. Hrsh-Hgn had made it clear, many times. A Chairman was as necessary to a Board planet as the zero was in mathematics, but being a zero had big disadvantages ...