V

accomplice, and will lead me to him. Wait up for me.” The hall door had hardly slammed behind our visitor before Holmes had descended the stair. Looking through the window I could see her walking feebly along the other side, while her pursuer dogged her some little distance behind. “Either his whole theory is incorrect,” I thought to myself, “or else he will be led now to the heart of the mystery.” There was no need for him to ask me to wait up for him, for I felt that sleep was impossible until I heard the result of his adventure.

It was close upon nine when he set out. I had no idea how long he might be, but I sat stolidly puffing at my pipe and skipping over the pages of Henri Murger’s Vie de Bohème . Ten o’clock passed, and I heard the footsteps of the maid as they pattered off to bed. Eleven, and the more stately tread of the landlady passed my door, bound for the same destination. It was close upon twelve before I heard the sharp sound of his latchkey. The instant he entered I saw by his face that he had not been successful. Amusement and chagrin seemed to be struggling for the mastery, until the former suddenly carried the day, and he burst into a hearty laugh.

“I wouldn’t have the Scotland Yarders know it for the world,” he cried, dropping into his chair; “I have chaffed them so much that they would never have let me hear the end of it. I can afford to laugh, because I know that I will be even with them in the long run.”

“What is it then?” I asked.

“Oh, I don’t mind telling a story against myself. That creature had gone a little way when she began to limp and show every sign of being footsore. Presently she came to a halt, and hailed a four-wheeler which was passing. I managed to be close to her so as to hear the address, but I need not have been so anxious, for she sang it out loud enough to be heard at the other side of the street, ‘Drive to 13, Duncan Street, Houndsditch,’