“Sitting up at night is always rather jumpy,” she confessed.

“Yes,” said Sir James. “We are in the condition of people holding a séance. Perhaps if a medium were present we might get some marvellous results.”

“Do you believe in spiritualism?” asked Tuppence, opening her eyes wide.

The lawyer shrugged his shoulders.

“There is some truth in it, without a doubt. But most of the testimony would not pass muster in the witness-box.”

The hours drew on. With the first faint glimmerings of dawn, Sir James drew aside the curtains. They beheld, what few Londoners see, the slow rising of the sun over the sleeping city. Somehow, with the coming of the light, the dreads and fancies of the past night seemed absurd. Tuppence’s spirits revived to the normal.