He swung the beam of the flash-light. It lit up the tombstones, making them look startlingly white in the darkness.

“I think this looks like it.” Duffy paused and pointed the beam.

Over on the left stood a mausoleum in black marble. It was almost invisible until the beam showed it up. They went over and examined it carefully. The marble door was locked.

“This is Cattley’s new home,” Duffy said, running his hand down the smooth cold door. “But how the hell do we get him in?”

He put his shoulder against the door and heaved. He made his shoulder sore, but the door remained solid.

“What’s that number there?” Annabel asked. She was holding the flash so that he could push against the door.

Duffy followed her eye. There was a small plate let in on the side of the door with a number 7 printed on it. Duffy said he didn’t know.

“Do you think they keep the keys of these places at the porter’s place?” she asked.

Duffy grinned at her. “That’s a grand idea,” he said. “Let’s go an’ see.”

The porter’s lodge, by the gates, was locked and deserted but Duffy got a window open without much difficulty and looked round. He found a rack of keys by the front door, each key had a wooden tab hanging from it, with a number burned into the wood. He looked for number 7 and found it.