He was the brother of Lewis's grandfather. Lewis's great uncle was C. Auguste Dupin.

And his greatest case — the Murders in the Rue Morgue —they too were based on fact. The slaughters that occurred in the story had actually taken place. Two women had indeed been brutally killed in the Rue Morgue. They were, as Poe had written, Madame L'Espanaye and her daughter Mademoiselle Camille L'Espanaye. Both women of good reputation, who lived quiet and unsensational lives. So much more horrible then to find those lives so brutally cut short. The daughter's body had been thrust up the chimney; the body of the mother was discovered in the yard at the back of the house, her throat cut with such savagery that her head was all but sawn off. No apparent motive could be found for the murders, and the mystery further deepened when all the occupants of the house claimed to have heard the voice of the murderer speaking in a different language. The Frenchman was certain the voice had spoken Spanish, the Englishman had heard German, the Dutchman thought it was French. Dupin, in his investigations, noted that none of the witnesses actually spoke the language they claimed to have heard from the lips of the unseen murderer. He concluded that the language was no language at all, but the wordless voice of a wild beast.

An ape in fact, a monstrous orang-outang from the East Indian Islands. Its tawny hairs had been found in the grip of the slain Madame L'Espanaye. Only its strength and agility made the appalling fate of Mademoiselle L'Espanaye plausible. The beast had belonged to a Maltese sailor, had escaped, and run riot in the bloody apartment on the Rue Morgue.

That was the bones of the story.

Whether true or not the tale held a great romantic appeal for Lewis. He liked to think of his great uncle logically pacing his way through the mystery, undistressed by the hysteria and horror around him. He thought of that calm as essentially European; belonging to a lost age in which the light of reason was still valued, and the worst horror that could be conceived of was a beast with a cut-throat razor.

Now, as the twentieth century ground through its last quarter, there were far greater atrocities to be accounted for, all committed by human beings. The humble orang­-outang had been investigated by anthropologists and found to be a solitary herbivore; quiet and philosophical. The true monsters were far less apparent, and far more powerful. Their weapons made razors look pitiful; their crimes were vast. In some ways Lewis was almost glad to be old and close to leaving the century to its own devices. Yes, the snow froze his marrow. Yes, to see a young girl with a face of a goddess uselessly stirred his desires. Yes, he felt like an observer now instead of a participator.

But it had not always been that way.

In 1937, in the very room at number eleven, Quai de Bourbon, where he now sat, there had been experience enough. Paris was still a pleasure-dome in those days, studiously ignoring rumours of war, and preserving, though at times the strain told, an air of sweet naïveté. They had been careless then; in both senses of the word, living endless lives of perfect leisure.

It wasn't so of course. The lives had not been perfect, or endless. But for a time — a summer, a month, a day — it had seemed nothing in the world would change.

In half a decade Paris would burn, and its playful guilt, which was true innocence, would be soiled permanently. They had spent many days (and nights) in the apartment Lewis now occupied, wonderful times; when he thought of them his stomach seemed to ache with the loss.

His thoughts turned to more recent events. To his New York exhibition, in which his series of paintings chronicling the damnation of Europe had been a brilliant critical success. At the age of seventy-three Lewis Fox was a feted man. Articles were being written in every art periodical. Admirers and buyers had sprung up like mushrooms overnight, eager to purchase his work, to talk with him, to touch his hand. All too late, of course. The agonies of creation were long over, and he'd put down his brushes for the last time five years ago. Now, when he was merely a spectator, his critical triumph seemed like a parody: he viewed the circus from a distance with something approaching distaste.

When the telegram had come from Paris, begging for his assistance, he had been more than pleased to slip away from the ring of imbeciles mouthing his praise.

Now he waited in the darkening apartment, watching the steady flow of cars across the Pont Louis-Phillipe, as tired Parisians began the trek home through the snow. Their horns blared; their engines coughed and growled; their yellow fog lamps made a ribbon of light across the bridge.

Still Catherine didn't come.

The snow, which had held off for most of the day, was beginning to fall again, whispering against the window. The traffic flowed across the Seine, the Seine flowed under the traffic. Night fell. At last, he heard footsteps in the hail; exchanged whispers with the housekeeper.

It was Catherine. At last, it was Catherine.

He stood up and stared at the door, imagining it opening before it opened, imagining her in the doorway.

"Lewis, my darling —"

She smiled at him; a pale smile on a paler face. She looked older than he'd expected. How long was it since he'd seen her? Four years or five? Her fragrance was the same as she always wore: and it reassured Lewis with its permanence. He kissed her cold cheeks lightly.

"You look well," he lied.

"No I don't," she said. "If I look well it's an insult to Phillipe. How can I be well when he's in such trouble?"

Her manner was brisk, and forbidding, as always.

She was three years his senior, but she treated him as a teacher would a recalcitrant child. She always had: it was her way of being fond.

Greetings over, she sat down beside the window, staring out over the Seine. Small grey ice-floes floated under the bridge, rocking and revolving in the current. The water looked deadly, as though its bitterness could crush the breath out of you.

"What trouble is Phillipe in?"

"He's accused of—"

A tiny hesitation. A flicker of an eyelid.

"— murder."

Lewis wanted to laugh; the very thought was preposterous. Phillipe was sixty-nine years old, and as mild-mannered as a lamb.

"It's true, Lewis. I couldn't tell you by telegram, you understand. I had to say it myself. Murder. He's accused of murder."

"Who?"

"A girl, of course. One of his fancy women."

"He still gets around, does he?"

"We used to joke he'd die on a woman, remember?"

Lewis half-nodded.

"She was nineteen. Natalie Perec. Quite an educated girl, apparently. And lovely. Long red hair. You remember how Phillipe loved redheads?"

"Nineteen? He has nineteen year olds?"

She didn't reply. Lewis sat down, knowing his pacing of the room irritated her. In profile she was still beautiful, and the wash of yellow-blue through the window softened the lines on her face, magically erasing fifty years of living.

"Where is he?"

"They locked him up. They say he's dangerous. They say he could kill again."

Lewis shook his head. There was a pain at his temples, which might go if he could only close his eyes.

"He needs to see you. Very badly."

But maybe sleep was just an escape. Here was something even he couldn't be a spectator to.

Phillipe Laborteaux stared at Lewis across the bare, scored table, his face weary and lost. They had greeted each other only with handshakes; all other physical contact was strictly forbidden.

"I am in despair," he said. "She's dead. My Natalie is dead."

"Tell me what happened."

"I have a little apartment in Montmartre. In the Rue des Martyrs. Just a room really, to entertain friends. Catherine always keeps number 11 so neat, you know, a man can't spread himself out. Natalie used to spend a lot of time with me there: everyone in the house knew her. She was so good natured, so beautiful. She was studying to go into Medical School. Bright. And she loved me."