And then they broke off and looked around sharply, as every ticket machine in the lobby suddenly spat up all the coins it had taken. Pound coins and assorted change jumped and clattered across the floor as they were ejected with force, bouncing and rolling everywhere, shining and shimmering in the over-bright light. Some of them rolled right up to Erik’s feet, and he reached down to grab a handful; but Natasha stopped him with a harsh command. One by one the machines ran out of money and fell silent. Coins lay scattered all over the floor. Natasha watched the ticket machines carefully for a while, to see if they’d do anything else, but they remained still and silent. She turned her back on them and the money with studied insolence and returned to the top of the escalator. Erik carefully packed his cat-head computer back into its pack, then casually scooped up a handy two-pound coin. Only to yell and throw it away again.

“Hot!” he said. “Hot hot hot!”

“Did it burn you?” said Natasha, not looking around.

“Yes!”

“Good.”

Erik scowled. “Damned thing was hot enough to have been coughed up from Hell itself. What was that for?”

“Someone is playing games with us,” said Natasha.

“Could it be JC and his people?” said Erik, immediately forgetting the pain in his fingertips. “Could they know we’re here?”

“No,” said Natasha. “I’d know . . . if they knew. I think this is something else . . .”

She left the elevators, made her way back through the open ticket barriers, and strolled unhurriedly around the entrance lobby, frowning as she forced her telepathy into every psychic nook and cranny. Her gaze shot suddenly to one side, and she advanced remorselessly on one corner. And then she stopped as Erik hissed her name, and a ragged man appeared suddenly in the lobby with them. He shuffled slowly around, ignoring the coins on the floor as though they weren’t there, and perhaps for him they weren’t. He looked like one of the homeless, tall but stooped, a ragged man in ragged clothes, wrapped up in a long coat stained with damp and mould. He had long, matted hair and a filthy beard, and his eyes were dull, preoccupied with cold and hunger and memories that wouldn’t go away. He slowly made a full circle of the lobby, shuffling right past Natasha and Erik without even seeing them. Until, slowly, he seemed to become aware that he was not alone. His head came up, and his dull eyes fixed on Natasha. He didn’t seem at all surprised to see her, or even to care that much. He held out one filthy hand, mutely asking for money.

“He’s not real,” said Erik. “He’s a ghost.”

“Thank you, I had worked that out for myself,” said Natasha.

“Is he aware?” said Erik, professionally interested. “Or is this only a stone tape, a psychic recording?”