'You brought him here today,' said Ibn Shaprut. 'You have no family who could have taken him?'

'My parents fled to Granada before the Christian armies came to the walls.'

'Without you?'

'They were ashamed of me. My grandmother stayed, though, and helped me. But she died in the spring.'

'Now you're alone,' said Ibrahim.

'Yes, sir.'

Ali Gurdu clenched a podgy fist. 'You'll be offering her a sugared apricot next. Enough of these questions! She's a thief! That's what this is all about, never mind her baby and her grandmother. She stole from me!'

Ibrahim glanced at his notes. Ali Gurdu described himself as a food merchant. He was steadily selling off a hoard of dried fruit and salted meat and rice. That wasn't quite against the law, even at the exorbitant prices he no doubt charged. But Ibrahim thought there was a stink about the man that was more than just a layer of greasy sweat.

'She came to you as a customer,' he said. 'She bought a bit of salted meat.'

'What meat was that?' Ibn Shaprut asked the girl.

She shrugged. 'Rat, I think. Or cat. What else is there?'

The flesh of a rat, which had no doubt gorged itself on the bodies in the communal graves. 'So you took your bit of rat-'

'She took two sticks,' Ali Gurdu insisted. 'More than she'd paid for.'

'One wasn't enough,' the girl said miserably. 'The baby – I still feed him.'

'That is draining for your body,' Ibn Shaprut said gently. 'I understand.'

'She ran away with the meat she stole.'

'But you didn't chase her,' Ibn Shaprut said. 'She was only caught because she was unlucky enough to run straight into one of Ibrahim's bailiffs. If not for that you'd have said nothing about it.'

Ali Gurdu blustered, 'I was simply slow about it. Shocked. Distressed! I'm not used to such blatant thievery, from a very young girl too. What's the world coming to?'

Ibrahim raised a hand to silence him. 'Obona, how did you pay for this meat? Do you have money?'

She shook her head. 'My parents took what we had. My grandmother had a few coins, but when she was dying I spent the last of those on a bit of water.'

'Yet you must eat,' Ibrahim said. 'Yet you must drink. How did you pay him?'

She glanced at Ali Gurdu, and looked down at her baby, clearly ashamed.

'Well, I think that's clear enough,' Ibrahim said, not bothering to hide his disgust. 'Food for sex, Ali Gurdu? Is that the game?'

Ali Gurdu looked defiant. 'You could call it pity. I mean, look at her. Skin and bone. Who would want her?' He slammed one fat fist into another. 'But it's still theft, that's the top and bottom of it. So what are you going to do about it, "vizier to the vizier"?'

Ibrahim's thirst raged, though there were hours to endure before his next sip of his water ration. He felt fouled by this grubby case, like so many others he had had to deal with.

It was all the fault of the Christians. The Castilians had lain siege around the city in the spring, when King Fernando had assembled a fleet of ships from the coastal waters, forced his way up the Guadalquivir and rammed the pontoon bridge. Thus, after years of pressure, Fernando had at last bottled the city up. As spring gave way to the usual ferocious summer, disease, famine, and worst of all drought had afflicted the city. Fernando seemed content to wait it out, even as his own men dropped of drought and fever. Once there had been rumours of a relieving force coming from Granada. But that taifa's ruler Muhammad Abu Alahmar, concerned above all to secure his own position, submitted to King Fernando and actually joined in the siege against his fellow Muslims in Seville.

Sometimes Ibrahim wondered grimly how it would be if the siege never lifted. Would Ibrahim and those like him be forced to administer the death of an entire city, down to the last man, the last child, the last dog and cat?

But meanwhile, today, he had Ali Gurdu and this child-mother Obona to deal with. He glanced at Ibn Shaprut's stern face, seeking guidance.

'Here is my decision. Ali Gurdu, you have a certain usefulness. Men like you, with your grafting and your greed, actually enforce the rationing. You're dribbling out your stock, bit by bit. If you gave it all away there would be a riot, it would be gone in a day, and we'd be a lot worse off.'

'You need me, do you?' Ali Gurdu scoffed.

'But there are limits. We are not like the Christians. We are civilised people, despite the emergency. And if I find you step beyond those limits again, I will impound whatever stock you have left, and I will punish you as I see fit.' He leaned forward. 'Have a care, Ali Gurdu. It will be a different story for men like you when the siege is lifted.'

But Ibrahim thought the worst irony was that if the Christians did take the city, Ali Gurdu might have made himself wealthy enough from the misery of others to be able to buy his way to safety.

'And,' Ali Gurdu said, 'what of her?'

Ibrahim glanced at the wretched girl. 'How would it help anybody if this child was punished?'

'She is a thief!'

Ibrahim said to the girl, 'Well, he's right. You must pay this man back.'

'How can I do that?'

'Catch a rat,' Ibrahim said. 'And don't go to him again, next time you're hungry. Try these people. They are kinder.' He took his wooden pen and scribbled an address on a scrap of old paper and gave it to her. 'Now get out of my sight, both of you.'

He scratched his pen across the case notes and put the parchment aside. Then he stood, stretched, and glanced out of the window at a sky like an oven. He longed for the blessed cool of evening – at least nature lifted its siege, once a day. But Ibrahim's own long day was not done yet.

'Right. That's that. Who's next?'

On the parched plain before the walls of Seville, Saladin woke inside his leather tent.

Hanse had died during the night. It had been the fever, of course. Hanse had fallen asleep coughing and puking. Now he was a shapeless, unmoving lump under his sweat-sodden cloak.

And Saladin had slept in a tent with a dead man. With a sudden terror he pushed his way out into the open air, panting.

The sun was still low, but Saladin could already feel its heat on his face. The camp of the Christian army stretched away all around him. Horses wandered apathetically between the rows of tents, and cross-bearing pennants hung limply over a land long stripped of anything edible.

Inside Seville, the muezzins were calling. The pinkish light of day, scattered through the dust rising from the desiccated landscape, reflected from the city walls.

Near the tent, Michael sat cross-legged before the remnants of the night's fire, resting his back on a heap of weapons and chain-mail coats. He was sipping a cup of water and eating dry rice. 'This isn't so bad for soldiering,' Michael said in his coarse shopkeeper's Latin. 'Not so bad.'

Saladin sat heavily beside him. 'What do you mean, not so bad? Hanse's dead. Is that his rice?'

Michael grinned and finished off the food. 'Well, he won't be needing it, will he?'

Saladin reached for the flask that contained the last of yesterday's water. There was hardly any left. He felt unreasonably resentful that a third of it had been wasted on a man now dead.

They sat without speaking.

When he had taken the Cross – he wore it proudly on his sleeve even now – and volunteered for Fernando's army, Saladin had joined a company formed from many nations, Christian warriors drawn here from across Europe by the Pope's granting of crusader indulgences – that and the chance to liven up your life by cracking a few Muslim heads. Hanse and Michael were typical, Hanse, blond and a bit frail, from the Low Countries, Michael from England.

It had been curious for Saladin to come up against the Moorish armies, the elite warriors with their quilted light armour, the hard-eyed horsemen from the desert. They were not much like the Saracen troops he had witnessed in the Outremer. Brother Thomas had told him that the Moors of Spain had absorbed the traditions of those who went before them; there were echoes of the post-Roman Visigoths in their cavalry and their colour.