"Sarasate plays at St. James's Hall this afternoon," he remarked. "What do you think, Watson? Could your patients spare you for a few hours?" "I have nothing to do to-day. My practice is never very absorbing." "Then put on your hat and come. I am going through the City first, and we can have some lunch on the way. I observe that there is a good deal of German music on the programme, which is rather more to my taste than Italian or French. It is introspective, and I want to introspect. Come along!" We traveled by the Underground as far as Aldersgate; and a short walk took us to Saxe-Coburg Square, the scene of the singular story which we had listened to in the morning. It was a poky, little, shabby-genteel place, where four lines of dingy, two-storied brick houses looked out into a small railed-in inclosure, where a lawn of weedy grass, and a few clumps of faded laurel bushes made a hard fight against a smoke-laden and uncongenial atmosphere. Three gilt balls and a brown board with JABEZ WILSON in white letters, upon a corner house, announced the place where our red-headed client carried on his business. Sherlock Holmes stopped in front of it with his head on one side, and looked it all over, with his eyes shining brightly between puckered lids. Then he walked slowly up the street, and then down again to the corner, still looking keenly at the houses. Finally he returned to the pawnbroker's and, having thumped vigorously upon the pavement with his stick two or three times, he went up to the door and knocked. It was instantly opened by a bright-looking, clean-shaven young fellow, who asked him to step in. "Thank you," said Holmes, "I only wished to ask you how you would go from here to the Strand." "Third right, fourth left," answered the assistant, promptly, closing the door. "Smart fellow, that," observed Holmes as we walked away. "He is, in my judgment, the fourth smartest man in London, and for daring I am not sure that he has not a claim to be third. I have known something of him before." "Evidently," said I, "Mr. Wilson's assistant counts for a good deal in this mystery of the Red-headed League. I am sure that you inquired your way merely in order that you might see him." "Not him." "What then?" "The knees of his trousers." "And what did you see?" "What I expected to see." "Why did you beat the pavement?" "My dear doctor, this is a time for observation, not for talk. We are spies in an enemy's country. We know something of Saxe-Coburg Square. Let us now explore the parts which lie behind it."