“Already?”

“Yes, I sent wires from Woking station to every evening paper in London. This advertisement will appear in each of them.”

He handed over a sheet torn from a notebook. On it was scribbled in pencil: “£10 reward. The number of the cab which dropped a fare at or about the door of the Foreign Office in Charles Street at quarter to ten in the evening of May 23rd . Apply 221 B, Baker Street.”

“You are confident that the thief came in a cab?”