Where he had come from T. B. could only conjecture; he had appeared as if by magic and was fully dressed.

"To what do I owe the honour of this visit, Mr. Smith?" he said, in his dry, grim way.

"A spirit of curiosity," said T. B., coolly. "I was anxious to secure another peep at your Mr. Moole."

"And how did he look?" asked the other, with a faint smile.

"Unfortunately," said T. B., "I have mistaken the floor, and instead of seeing our friend, I have unexpectedly and quite unwittingly interrupted a gentleman who, for reasons best known to himself, has hidden his face."

Dr. Fall frowned.

"I do not quite follow you," he said.

"Perhaps if I were to follow you back to the room," said T. B. good-humouredly, "you might understand better."

He heard a strange wailing sound and a shivering motion beneath his feet, as though a heavy traction engine were passing close to the house.