Like a historian, I interpret, select, discard, shape, simplify. Unlike a historian, I make up people's thoughts.

The writer I adore is Ivy Compton-Burnett.I couldn't get more than a few pages in when I first read her. In many ways, she is very clumsy and her plots are rubbish. But we don't read her for that. There are pages and pages of dialogue. What it requires is real effort and attention.

I'm a very organised and rational and linear thinker and you have to stop all that to write a novel.

Rafe asks him, could the king's freedom be obtained, sir, with more economy of means? Less bloodshed? Look, he says: once you have exhausted the process of negotiation and compromise, one you have fixed on the destruction of an enemy, that destruction must be swift and it must be perfect. Before you even glance in his direction, you should have his name on a warrant, the ports blocked, his wife and friends bought, his heir under your protection, his money in your strong room and his dog running to your whistle. Before he wakes in the morning, you should have the axe in your hand.

He once thought it himself, that he might die with grief: for his wife, his daughters, his sisters, his father and master the cardinal. But pulse, obdurate, keeps its rhythm. You think you cannot keep breathing, but your ribcage has other ideas, rising and falling, emitting sighs. You must thrive in spite of yourself; and so that you may do it, God takes out your heart of flesh, and gives you a heart of stone.

And if a diversion is needed, why not arrest a general? Arthur Dillon is a friend of eminent deputies, a contender for the post of Commander-in-Chief of the Northern Front; he has proved himself at Valmy and in a halfdozen actions since. In the National Assembly he was a liberal; now he is a republican. Isn't it then logical that he should be thrown into gaol, July 1, on suspicion of passing military secrets to the enemy?

If the monarchy were removed tomorrow, it wouldn't have a huge effect on the national mind-set. The monarchy is mildly interesting and largely harmless. I can't find I can get very heated about it. In the next couple of generations, it is bound to go. There is so much else in the world that is more interesting.