So that's the news sped to the Emperor. It would have been good if the old marriage were out, the new marriage in, confirmed to Europe before Anne's happy state were announced. But then, life is never perfect for the servant of a prince; as Thomas More used to say, we should not look to go to Heaven on feather beds.

Two days later he is alone with Anne; she is tucked into a window embrasure, eyes closed, basking like a cat in a scarce shaft of winter sun. She stretches out her hand to him, hardly knowing who he is; any man will do? He takes her fingertips. Her black eyes snap open. It's like a shop when the shutters are taken down: good morning, Master Cromwell, what can we sell each other today?

‘I am tired of Mary,’ she says. ‘And I would like to be rid of her.’

Does she mean Katherine's daughter, the princess? ‘She should be married,’ she says, ‘and out of my way. I never want to have to see her. I don't want to have to think about her. I have long imagined her married to some obscure person.’

He waits, still wondering.

‘I don't suppose she would be a bad wife, for somebody who was prepared to keep her chained to the wall.’

‘Ah. Mary your sister.’

‘What did you think? Oh,’ she laughs, ‘you thought I meant Mary the king's bastard. Well, now you put it in my mind, she should be married too. What age is she?’

‘Seventeen this year.’

‘And still a dwarf?’ Anne doesn't wait for an answer. ‘I shall find some old gentleman for her, some very honourable feeble old gentleman, who will get no children on her and whom I will pay to stay away from court. But as for Lady Carey, what is to be done? She cannot marry you. We tease her that you are her choice. Some ladies have a secret preference for common men. We say, Mary, oh, how you long to repose in the arms of the blacksmith … even at the thought, you are growing hot.’

‘Are you happy?’ he asks her.

‘Yes.’ She drops her eyes, and her small hands rest on her ribcage. ‘Yes, because of this. You see,’ she says slowly, ‘I was always desired. But now I am valued. And that is a different thing, I find.’

He pauses, to let her think her own thoughts: which he sees are precious to her. ‘So,’ she says, ‘you have a nephew Richard, a Tudor of sorts, though I am sure I cannot understand how that came about.’

‘I can draw out for you the tree of descent.’

She shakes her head, smiling. ‘I wouldn't give you the trouble. Since this,’ her fingers slip downwards, ‘I wake up in the morning and I scarcely remember my name. I always wondered why women were foolish, and now I know.’

‘You mentioned my nephew.’

‘I have seen him with you. He looks a determined boy. He might do for her. What she wants are furs and jewels. You can give her those, can't you? And a child in the cradle every other year. As for who fathers it, you can make your own household arrangements about that.’

‘I thought,’ he says, ‘that your sister had an attachment?’

He doesn't want revenge: just clarification.

‘Does she? Oh well, Mary's attachments … usually passing and sometimes very odd – as you know, don't you.’ It's not a question. ‘Bring them to court, your children. Let's see them.’

He leaves her, eyes closing again, edging into marginal warmth, the small sort of sunbeam that is all February offers.

The king has given him lodgings within the old palace at Westminster, for when he works too late to get home. This being so, he has to walk mentally through his rooms at Austin Friars, picking up his memory images from where he has left them on windowsills and under stools and in the woollen petals of the flowers strewn in the tapestry at Anselma's feet. At the end of a long day he takes supper with Cranmer and with Rowland Lee, who stamps between the various working parties, urging them along. Sometimes Audley joins them, the Lord Chancellor, but they keep no state, just sit down like a bunch of inky students, and talk till it's Cranmer's bedtime. He wants to work them out, these people, test how far he can rely on them, and find out their weaknesses. Audley is a prudent lawyer who can sift a sentence like a cook sifting a sack of rice for grit. An eloquent speaker, he is tenacious of a point, and devoted to his career; now that he's Chancellor he aims to make an income to go with the office. As for what he believes, it's up for negotiation; he believes in Parliament, in the king's power exercised in Parliament, and in matters of faith … let's say his convictions are flexible. As for Lee, he wonders if he believes in God at all – though it doesn't stop him having a bishopric in his sights. He says, ‘Rowland, will you take Gregory into your household? I think Cambridge has done all that it can for him. And I admit that Gregory has done nothing for Cambridge.’

‘I'll take him up the country with me,’ Rowland says, ‘when I go to have a row with the northern bishops. He is a good boy, Gregory. Not the most forward, but I can understand that. We'll make him useful yet.’

‘You don't intend him for the church?’ Cranmer asks.

‘I said,’ growls Rowland, ‘we'll make him useful.’

At Westminster his clerks are in and out, with news and gossip and paperwork, and he keeps Christophe with him, supposedly to look after his clothes, but really to make him laugh. He misses the music they have nightly at Austin Friars, and the women's voices, heard from other rooms.

He is at the Tower most days of the week, persuading the foremen to keep their men working through frost and rain; checking the paymaster's accounts, and making a new inventory of the king's jewels and plate. He calls on the Wardens of the Mint, and suggests a spot check on the weight of the king's coinage. ‘What I should like to do,’ he says, ‘is make our English coins so sound that the merchants over the sea won't even bother weighing them.’

‘Do you have authority for this?’

‘Why, what are you hiding?’

He has written a memorandum for the king, setting out the sources of his yearly revenues, and detailing through which government offices they pass. It is remarkably concise. The king reads it and reads it again. He turns the paper over to see if anything convoluted and inexplicable is written on the back. But there is nothing more than meets his eye.

‘It's not news,’ he says, half-apologetic. ‘The late cardinal carried it in his head. I shall keep calling at the Mint. If Your Majesty pleases.’

At the Tower he calls on a prisoner, John Frith. At his request, which does not count for nothing, the prisoner is cleanly kept above ground, with warm bedding, sufficient food, a supply of wine, paper, ink; though he has advised him to put away his writings if he hears the key in his lock. He stands by while the turnkey admits him, his eyes on the ground, not liking what he is going to see; but John Frith rises from his table, a gentle, slender young boy, a scholar in Greek, and says, Master Cromwell, I knew you would come.

When he takes Frith's hands he finds them all bones, cold and dry and with tell-tale traces of ink. He thinks, he cannot be so delicate, if he has lived so long. He was one of the scholars shut in the cellar at Wolsey's college, where the Bible men were held because there was no other secure place. When the summer plague struck underground, Frith lay in the dark with the corpses, till someone remembered to let him out.

‘Master Frith,’ he says, ‘if I had been in London when you were taken –’

‘But while you were in Calais, Thomas More was at work.’

‘What made you come back into England? No, don't tell me. If you were going about Tyndale's work, I had better not know it. They say you have taken a wife, is that correct? In Antwerp? The one thing the king cannot abide – no, many things he cannot abide – but he hates married priests. And he hates Luther, and you have translated Luther into English.’

‘You put the case so well, for my prosecution.’

‘You must help me to help you. If I could get you an audience with the king … you would have to be prepared, he is a most astute theologian … do you think you could soften your answers, to accommodate him?’

The fire is built up but the room is still cold. You cannot get away from the mists and exhalations of the Thames. Frith says, his voice barely audible, ‘Thomas More still has some credit with the king. And he has written him a letter, saying,’ he manages to smile, ‘that I am Wycliffe, Luther and Zwingli rolled together and tied up in string – one reformer stuffed inside another, as for a feast you might parcel a pheasant inside a chicken inside a goose. More means to dine on me, so do not injure your credit by asking for mercy. As for softening my answers … I believe, and I will say before any tribunal –’

‘Do not, John.’

‘I will say before any tribunal what I will say before my last judge – the Eucharist is but bread, of penance we have no need, Purgatory is an invention ungrounded in scripture –’

‘If some men come to you and say, come with us, Frith, you go with them. They will be my men.’

‘You think you can take me out of the Tower?’