What fascinates me are the turning points where history could have been different.

I make up as little as possible. I spend a great deal of time on research, on finding all the available accounts of a scene or incident, finding out all the background details and the biographies of the people involved there, and I try to run up all the accounts side by side to see where the contradictions are and to look where things have gone missing. And it's really in the gap - it's in the erasures - that I think the novelist can best go to work because inevitably in history in any period, we know a lot about what happened, but we may be far hazier on why it happened. And there's always the question, why did it happen the way it did? Where was the turning point?

But it is no use to justify yourself. It is no good to explain. It is weak to be anecdotal. It is wise to conceal the past even if there is nothing to conceal. A man's power is in the half-light, in the half-seen movements of his hand and the unguessed-at expression of his face. It is the absence of facts that frightens people: the gap you open, into which they pour their fears, fantasies, desires.

There's a feeling of power in reserve, a power that drives right through the bone, like the shiver you sense in the shaft of an axe when you take it into your hand. You can strike, or you can not strike, and if you choose to hold back the blow, you can still feel inside you the resonance of the omitted thing.

The fate of peoples is made like this, two men in small rooms. Forget the coronations, the conclaves of cardinals, the pomp and processions. This is how the world changes: a counter pushed across a table, a pen stroke that alters the force of a phrase, a woman's sigh as she passes and leaves on the air a trail of orange flower or rose water; her hand pulling close the bed curtain, the discreet sigh of flesh against flesh.

I once stole a book. It was really just the once, and at the time I called it borrowing. It was 1970, and the book, I could see by its lack of date stamps, had been lying unappreciated on the shelves of my convent school library since its publication in 1945.