Field stopped, then turned off to the left.

This alley was dark and much narrower. The dust rose around him as he walked, the only sound that of distant voices. There was no sunlight to penetrate the gloom. He heard the tinkle of a bicycle bell.

A figure came at him from a doorway and knocked him down. The man was onto him as he regained his feet, pushing him back hard against the wall, a revolver pressing against Field’s nose.

“What the fuck are you doing?” Caprisi growled.

Field waited until he’d regained his breath. “Following you.”

“Why?”

“I saw you go into Lu’s house.”

Caprisi held him still, then relaxed his grip and took a step back, without lowering his gun. “You’re lucky I didn’t kill you.”

“So you’re on the take, like everyone else?”

The American raised the revolver again so that it was pointing at Field’s face. “You holier-than-thou Brits are getting on my nerves.”

Suddenly, Caprisi’s expression changed. He lowered his gun and put it back in its holster. “All right,” he said. “You want to know? I’ll show you.”

He walked away fast, so that Field had to struggle to keep up. They were in another warren of narrow alleys, where still almost no light penetrated and the smell of sewage and human excrement was overwhelming. A group of children played in an open drain to their right as they turned into a narrow path and ducked through a doorway.

Inside, it took a few seconds for Field’s eyes to adjust to the darkness. He heard a hacking cough and followed Caprisi over to the corner, where he was greeting a young woman and holding both her hands. He had crouched down and was taking something out of his satchel-bread and a metal flask of clean water.

“This is a”-he hesitated, looking at Field-“a friend.”

Field knelt down and smiled at the girl. She was pretty. In another world, without the dirt on her face and the rags on her back and without the stench in this place, she might even have been beautiful.

There were three children behind her. They stared at him, their eyes hollow with suffering. One, a girl, must have been six or seven; another, four or five; the youngest was a boy of, he guessed, two or three. Behind them a man lay flat on a thin straw mat, shirtless, his head on a small pile of clothes. When he coughed, it shook his entire body, shook the glistening sweat from its place.

Caprisi spoke quickly in Chinese, with his back to Field.

Field looked around the room. The five of them had only a small corner to themselves, and he estimated that there must be six or seven different families living in here, each with no more than a few square feet of floor space. They were all watching Caprisi and the woman, though most were trying to pretend they were busy with something else.

Field looked back to see the American take something else from his satchel-a bottle that looked like medicine and what could have been a roll of money. He placed the items in the woman’s hand and closed his own over it.

Caprisi stood. He touched each of the children on the head, as if blessing them, and then marched out. Field saw, as he passed, that he was upset and angry.

The American did not slow down until they were back at the rickshaw. “Do you see now?” he asked.

Field didn’t know how to answer.

“You see the great city we’re building? We’re always fucking congratulating ourselves on how marvelous it is…”

“Would it be any better if we weren’t here?”

“Don’t hide behind false moral choices, Field. At least it would be their city.” Caprisi sighed. “She was begging outside my apartment with all her children, looking even worse than tonight. Her husband is an addict and he stole some opium from one of Lu’s men, so if he’s found he’ll be executed. His family probably will, too, as a warning to others.”

“So you went to see Lu.”

“They’re small-fry, nothing to him. I said I would pay for what he had stolen.”

“But he said no?”

Caprisi nodded.

Field looked at his colleague, relief and regret threatening to swamp him. “I’m sorry.”

“After all that we’ve said, you doubted me.”

“I’m so sorry.”

“Why?”

Field crossed his arms defensively. “I was watching Granger on the telephone a couple days ago, after our first visit to the factory, and it suddenly occurred to me that if someone had called Lu to warn him that we were going to the factory-I mean if Granger had-then the operator would have made a record of it.”

“And?”

“The call came from your telephone.”

“And you think I made it?”

“Not anymore.”

“But you have thought that?”

Field said nothing for a moment, then nodded slowly. “You’ve been a friend to me-the only one who has-and I’m just so sorry.”

There was another uneasy silence. Then Caprisi took hold of Field’s hand, shaking it hard. “Okay,” he said. “Okay, Field. That’s it now, all right?”

Field felt his heart flooding with relief and warmth. “That’s it.” They clasped each other in a bear hug, then stepped apart, awkward in their newly rediscovered affection.

“You know…” Caprisi stopped as a trolley full of night soil was wheeled past and they were both forced to take a step back. The smell, which caught at the back of their throats, hung in the air long after the cart had passed.

Whatever he had been going to say, the American thought better of it.

“What will become of them?” Field asked.

“Of who?”

“That family.”

“Does it matter?”

“To you.”

Caprisi said, “But does it matter? I’m not changing a thing, am I? There are thousands like them. The parents die, the children are sold or starve to death or, if they’re lucky, wind up in an orphanage.”

“If they’re lucky.” Field hesitated, his throat dry. “Lu says he has found homes for some of the children from the Sisters of Mercy Orphanage and takes them away…”

“And?”

“He must have found homes for them, mustn’t he? It’s not possible that he just… disposes of them?”

“Field, this city is run by big business for big business. They pretend it’s part of the empire when it suits them, and if you’re American or British, then fine, but anyone else… Look around you.” Caprisi shook his head. “You think they care what Lu does with his own kind? You think your uncle or the French actually care how many little boys Lu takes away and abuses and dumps in the canals? You think what he does with them would make them pause over their breakfast served on silver salvers for a single fucking second? What do you think would be happening to ten times that number if Lu didn’t fund the orphanages in the first place? You’ve seen people dying in the streets. What do you think happens to the children once they’ve gone?”

Caprisi’s voice had become hoarse with bitterness. He climbed into his rickshaw.

“Caprisi.”

“It is all right, Field.”

“No it’s not.”

Caprisi put his hand up to tell the rickshaw driver not to pull away. “So who did make that call?”

Field didn’t have an answer.

“Macleod left the office with me; we were the last to go. I switched the lights out.”

Field was about to ask the American who he thought it had been, when Caprisi said, “Is there anything to tie Lewis directly to the murders? Do we have anything approaching evidence?”

“We’ve just got Lena’s notes. The fact that the shipments are coming from his factory.” Field paused. “What I saw at Delancey’s.”

“What about the boy? We believe he can identify Lewis, correct?”

“I’ve found the orphanage where the boy was taken, but he’s been moved and the sister is going to need to be persuaded.”

Caprisi flicked the dust from his trousers with the back of his hand. “What if we went to talk to Lewis? Said we had a witness who’d watched him go into Natalya Simonov’s house on the night of her murder. See how he reacts.”

“Natalya?”