'As a first defence,' Immacolata replied, her eyes fixed on the tear in the carpet. The first to be threatened, the first -'

'To wake.' said Shadwell.

'- to wake.'

'You think they're out there now?' he said. His gaze went to the window. They'd closed the curtains, to keep anyone from spying on their treasure, but he could picture the benighted city beyond. The thought that there might be magic loose out there brought an unexpected charge.

'Yes,' the Incantatrix said. 'I think they're awake. And the Scourge smells them in its sleep. It knows, Shadwell.'

'So what do we do?'

'We find them, before they attract any more attention. The Scourge may be ancient. May be slow and forgetful. But its power...' Her voice faded away, as though words were valueless in the face of such terrors. She drew a deep breath before beginning again. 'A day's scarcely gone by.' she said, 'when I haven't watched the menstruum for a sign of it coming. And it'll come, Shadwell. Not tonight maybe. But it'll come. And on that day there'll be an end to all magic.'

'Even to you?'

'Even to me.'

'So we have to find them.' said Shadwell.

'Not we,' said Immacolata. 'We needn't dirty our hands.' She started to walk back towards Shadwell's bedroom. They can't have gone far.' she said as she went. They're strangers here.'

At the door she stopped, and turned to him.

'On no account leave this room until we call you.' she said. 'I'm going to summon someone to be our assassin.'

'Who?' said Shadwell.

'Nobody you ever met.' the Incantatrix replied. 'He was dead a hundred years before you were born. But you and he had a good deal in common.'

'And where is he now?'

'In the Ossuary at the Shrine of the Mortalities, where he lost his life. He wanted to prove himself my equal you see, to seduce me. So he tried to become a necromancer. He might have done it too; there was nothing he wouldn't dare. But it went awry. He brought the Surgeons from some nether-world or other, and they weren't amused. They pursued him from one end of London to the other.

'At the last he broke into the Shrine. Begged me to call them off.' Her voice had become a whisper now. 'But how could I?' she said. 'He'd made his conjurations. All I could do was let the Surgeons perform what tricks Surgeons must. And at the end, when he was all blood, he said to me: Take my soul.'

She stopped. Then said: 'So I did.' She looked at Shadwell.

'Stay here.' she said, and closed the door.

Shadwell didn't need any encouragement to stay clear of the sisters while they were plotting. If he never again set eyes on the Magdalene and the Hag he would count himself a lucky man. But the ghosts were inseparable from their living sister; each, in some fashion incomprehensible to him, a part of the other. Their perverse union was only one of the mysteries that attended them; there were many others.

The Shrine of Mortalities, for one. It had been a gathering place for her Cult when she'd been at the height of her power and ambition. But she'd fallen from grace. Her desire to rule the Fugue, which had then still been a ragged collection of far-flung settlements, had been frustrated. Her enemies had assembled evidence against her, listing crimes that had begun in her mother's womb, and she and her followers had retaliated. There had been bloodshed, though Shadwell had never gathered the scale of it. The consequence however, he had gathered. Vilified and humiliated, Immacolata had been forbidden to tread the magic earth of the Fugue again.

She had not taken this exile well. Unable to mellow her nature, and so pass unseen amongst the Cuckoos, her history became a round of blood-lettings, pursuits and further bloodlettings. Though she was still known and worshipped by a cognoscenti, who called her by a dozen different names - the Black Madonna, the Lady of Sorrows, Mater Malifecorium -she became nevertheless a victim of her own strange purity. Madness beckoned; the only refuge from the banality of the Kingdom she was exiled in.

That was how she had been when Shadwell had found her. A mad woman, whose talk had been like none he'd heard before, and who spoke in her ramblings of things that, could he but lay his hands upon them, would make him mighty.

And now, here they were, those wonders. All contained within a rectangle of carpet.

He approached the middle of it, staring down at the spiral of stylized clouds and lightning called the Gyre. How many nights had he lain awake, wondering what it would be like in that flux of energies? Like being with God, perhaps?; or the Devil.

He was shaken from these thoughts by a howl from the adjacent room, and the lamp above his head suddenly dimmed as its light was sucked beneath the intersecting door, testament to the profundity of darkness on the far side.

He moved to the opposite end of the room, and sat down.

How long until dawn? he wondered.

There was still no sign of morning, when - hours later, it seemed - the door opened.

There was only blackness beyond. Out of it, Immacolata said: 'Come and see.'

He stood up, his limbs stiff, and hobbled to the door.

A wave of heat met him at the threshold. It was like stepping into an oven in which cakes of human dirt and blood had been cooking.

Dimly, he could see Immacolata, standing- floating, perhaps - a little way from him. The air pressed against his throat: he badly wanted to retreat. But she beckoned.

'Look,' she instructed him, staring off into the darkness. 'Our assassin came. This is the Rake.'

Shadwell could see nothing at first. Then a shred of fugitive energy skittered up the wall and upon contact with the ceiling threw down a wash of cankered light.

By it, he saw the thing she called the Rake.

Had this once been a man? It was difficult to believe. The Surgeons Immacolata had spoken of had re-invented his anatomy. He hung in the air like a slashed coat left on a hook, his body somehow drawn out to superhuman height. Then, as though a breeze had gusted up from the earth, the body moved, swelling and rising. Its upper limbs - pieces of what might once have been human tissue held in an uneasy alliance by threads of mercurial cartilage - were raised, as if it were about to be crucified. The gesture unwound the matter that blinded its head. They fell away, and Shadwell could not prevent a cry from escaping him, as he understood what surgery had been performed upon the Rake.

They'd filleted him. They'd taken every bone from his body and left a thing more fit for the ocean-bed than the breathing world, a wretched echo of humanity, fuelled by the raptures the sisters had devised to bring it from Limbo. It swayed and swelled, its skull-less head taking on a dozen shapes as Shadwell watched. One moment it was all bulging eyes, the next only a maw, which howled its displeasure at waking to this condition.

'Hush ...' Immacolata told it.

The Rake shuddered and its arms grew longer, as if it wanted to kill the woman that had done this to it. But it fell silent nevertheless.

'Domville,' Immacolata said. 'You once professed love for me.'

It threw back its head then, as if despairing of what desire had brought it to.

'Are you afraid, my Rake?'

It looked at her, its eyes like blood blisters close to bursting.

'We've given you a little life,' she said. 'And enough power to turn these streets upside down. I want you to use it.'

The sight of the thing made Shadwell nervous.

'Is he in control of himself?' he whispered. 'Suppose he goes berserk?'

'Let him,' she said. 'I hate this city. Let him burn it up. As long as he kills the Seerkind, I don't care what he does. He knows he won't be allowed to rest until he's done as I ask. And Death's the best promise he's ever had.'

The blisters were still fixed on Immacolata, and the look in them confirmed her words.

'Very well,' Shadwell said, and turned away, heading back into the adjoining room. There was only so much of this magic a man could take.

The sisters had an appetite for it. They liked to immerse themselves in these rites. For himself, he was content to be human.