“You may rely on that.”

Carrados took out his pocket-book, produced an envelope bearing an American stamp, and from it extracted an unmounted print.

“Here is the photograph,” he announced. “The man is called Ulysses K. Groom, but he is better known as ‘Harry the Actor.’ You will find the description written on the back.”

Five minutes later, when they were alone, Mr Carlyle expressed his opinion of the transaction.

“You are an unmitigated humbug, Max,” he said, “though an amiable one, I admit. But purely for your own private amusement you spring these things on people.”

“On the contrary,” replied Carrados, “people spring these things on me.”

“Now this photograph. Why have I heard nothing of it before?”

Carrados took out his watch and touched the fingers.

“It is now three minutes to eleven. I received the photograph at twenty past eight.”

“Even then, an hour ago you assured me that you had done nothing.”