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Orm stared at the bit of human skin, flayed off the body of a man from a vanished future. He felt obscurely angry. What strange world was he living in that such things could be possible? 'Tell me what you intend to do about all this.'

'I intend,' Sihtric said coldly, 'to follow al-Hafredi's example.'

'What do you mean?'

'I have seen an Islamic future, through al-Hafredi's words. The Moors may have been turned back at Poitiers, but Islam is still strong-rampant. I will not allow such a victory to come about.' He smiled coldly. 'Like al-Hafredi, I will use the Moors' own wealth and learning against them.'

Orm said slowly, 'So you intend to develop your engines with Moorish money. Then you will hand over the weapons to the Christian kings. And with those engines, all of Islam will be destroyed.'

'That's the plan. Simple, isn't it? It may be that I won't live to see the project completed, of course. But that's of no relevance. The march of Christendom transcends a mere human life.'

'But to betray your sponsor-'

'It won't be hard. You've met him. The vizier's no fool, but he is a drunk. He's not hard to manipulate.'

Orm wasn't so sure about that. 'And what of your conscience, Sihtric? What of the helpless millions whose destinies you plan to deflect? What of their souls? Does that not trouble you?'

'No, Orm, I am not troubled. There is another line from Revelation here. Chapter three: 'I will not blot out his name out of the book of life.' But al-Hafredi did, and I will. You came here with your head full of vague plans to oppose me, didn't you? Your wife's nonsense about the Dove. But you're full of doubt. Lesser men always are. But I, I am doing God's work – I am sure of that – that is all that matters.'

A shadow crossed the room; a candle flickered. The vizier stood in the doorway, an armed guard at his side. 'And all that matters to me, priest, is that at last I have proof of your treachery.'

XXI

Alone in the dark, Robert measured space and time.

The floor was square, thirty by thirty of his foot-lengths paced out toe against heel. He could not see the ceiling, but he knew that many of the palace's rooms were rough cubes, so he imagined the room was as tall as it was wide. He explored the walls with his fingers. The room had arched doorways, but they were bricked up, save one closed by the heavy wooden door that had slammed shut after he had been thrown in here by the vizier's guards.

And he measured time. There was no passage of day or night; the bright Spanish sunlight was banished from his life. But he counted the meals that were shoved through a hatch in the door – bread, rice, a bit of water, delivered with a precious splinter of light. He counted his own pissing, his stools. He counted the times he slept, but his sleeping was poor.

In the dark he became confused in his counting, which distressed him.

It took him some of that passing time to work out that he was, in fact, imprisoned. There were few gaols in England, no cells save for a few dismal dungeons beneath the Normans' keeps, where athelings or other valuable captives might be held. If you committed a crime you might be executed, or mutilated, or fined; if you lived you went back to work. There wasn't the spare food to feed a population of prisoners. In al-Andalus, it seemed, things were different.

And as the days wore away and it dawned on Robert that he could see no end to this captivity, a deep horror settled on him.

He prayed every day, of course. Prayed every hour. Prayed constantly. He tried to mark Sunday, when he thought that day came. He recited the words of the holy Mass, as best he remembered them. Praying was better than thinking. Better than wondering what had become of his father, or Moraima, better than endlessly speculating why he had been thrown into this hole. Better than wondering what might become of him when he was finally released. Or, worse, how it would be if he were never released at all.

After the first few days he decided that he should treat his captivity as a trial. He thought of heroic monks like Saint Cuthbert, who deliberately sought out purposeful solitude in order better to understand their own souls, and God. If he were to become a soldier of God, fighting in the Pope's armies, he would face far worse torments than this.

He longed to be with Moraima. And he longed for his father to come and save him. But these were the weak thoughts of a child and he put them aside. He would use these hours in the hot, foetid, alien dark to cleanse his soul of weakness.

By the time his captors came for him, he thought only of God.

The door opened, flooding the cell with light. Two burly guards dragged him out of the dark. He was dazzled by the brilliance of a low sun. But he thought the guards flinched from the new holy light that burned from his own eyes.

XXII

Robert was shoved inside a reception room. Released, he staggered, and stood upright.

He glanced around. Books, bound volumes and scrolls, were piled roughly in one corner. Four arched doorways were all blocked by the burly bodies of guards – dark, stocky, powerful men, Berbers perhaps. The room was beautiful. But he had no time for beauty now; this was just as much a prison as his own shit-filled cell.

But Moraima, sweet Moraima was here too.

Moraima came to him, her hands folded into an anxious knot. A delicate scent of jasmine hung around her. He longed to take her in his arms, to let out the warmth that surged inside him. But he knew he must not.

She stood before him, uncertain how to read him. 'Robert. It has been so long. I thought they might have killed you. The vizier is like the weather; he comes and goes in his moods. He got angry with Sihtric, and he just locked everybody away.' She said hastily, 'I don't know what's happening here, Robert. But we must talk.' And she placed a hand on her belly.

Now Orm and Sihtric were brought in. Robert saw that they, too, had been imprisoned. Orm's beard was ragged, his hair untrimmed, the dirt ground deep into his pores, and there was a sewer stink of the cell about him. The priest, too, was shabby, and he scratched himself under a grimy habit.

Orm ran to his son and took his shoulders. 'Robert. What did they do?'

'I was stuck in a hole. They kept me in the dark.'

'In the dark, and alone? And we thought we had it bad, priest.'

'I am not harmed.'

Orm looked deep into his eyes, troubled. 'Are you sure? You look different.'

'Harder, I'd say,' said Sihtric. 'Not necessarily a bad thing, a bit of toughening up.'

'Shut up,' Orm said. 'Come sit over here.' They settled on floor cushions. 'Robert, I'm sorry.'

'Why?'

'Because it's my fault.'

Robert felt impatient that his father and this flawed priest were drawing the crisis about themselves like a cloak. 'How is it your fault? You were imprisoned too.'

Orm scratched his stubble. 'But I fear all this came about because of my foolishness – ours.'

He told Robert about the conversation he had had with Sihtric in another corner of the palace, about the Engines of God, and the Testament of al-Hafredi, and Sihtric's real intentions.

'Evidently we were overheard,' Orm said.

Sihtric said glumly, 'I've used that room for years.'

'But that part of the palace,' Orm told Robert, 'was an ambassador's court. It is a warren of tunnels and spy-holes. Moraima knew all about it. And this priest never thought to inquire.'

Sihtric snapped, 'But the vizier learned nothing damaging before you showed up in al-Andalus, Orm, with your