Monk paid the driver and let him go. He had no idea how long it would take them to break the news, or what they might find.

The house where Toby Argyll had lived was gracious but obviously was let in a series of rooms, as suited single men rather than families. A landlady in a dark dress and wearing an apron opened the door, immediately nervous on seeing two men unknown to her standing on the step. Orme was of average height with pleasant, ordinary features, but he wore a river policeman's uniform. Monk was taller and had the grace of a man conscious of his own magnetism. There was power in his face, lean-boned with a high-bridged, broad nose and unflinching eyes. It was a face of intelligence, even sensitivity, but few people found it comfortable.

"Good evening, ma'am," he said gently. His voice was excellent, his diction beautiful. He had worked hard to lose the Northumbrian accent that marked his origins. He had wanted passionately to be a gentleman. That desire was long past, but the music in his voice remained.

"Evenin', sir," she replied warily.

"My name is Monk, and this is Sergeant Orme, of the Thames River Police. Is this the home of Mr. Toby Argyll?"

She swallowed. "Yes, sir. Never say there's bin an accident in one o' them tunnels.'" Her hand flew to her mouth as if to stifle a cry. "I can't 'elp yer, sir. Mr. Argyll's not at ome."

"No, ma'am, there hasn't been, so far as I know," Monk replied. "But I'm afraid there has been a tragedy. I'm extremely sorry. Does Mr. Argyll live alone here?"

She stared at him, her round face paler now as she began to understand that they had come with the worst possible news.

"Would you like to go in and sit down?" Monk asked.

She nodded and backed away from him, allowing them to follow her along the passage to the kitchen.