“Certainly,” answered my friend, rising from his chair. “I’ll let you know, and Mr. Melas also. In the meantime, Mr. Melas, I should certainly be on my guard, if I were you, for of course they must know through these advertisements that you have betrayed them.”

As we walked home together, Holmes stopped at a telegraph office and sent off several wires.

“You see, Watson,” he remarked, “our evening has been by no means wasted. Some of my most interesting cases have come to me in this way through Mycroft. The problem which we have just listened to, although it can admit of but one explanation, has still some distinguishing features.”

“You have hopes of solving it?”