My friend’s plans were gradually revealing themselves. From this convenient retreat, the watchers were being watched and the trackers tracked. That angular shadow up yonder was the bait, and we were the hunters. In silence we stood together in the darkness and watched the hurrying figures who passed and repassed in front of us. Holmes was silent and motionless; but I could tell that he was keenly alert, and that his eyes were fixed intently upon the stream of passersby. It was a bleak and boisterous night and the wind whistled shrilly down the long street. Many people were moving to and fro, most of them muffled in their coats and cravats. Once or twice it seemed to me that I had seen the same figure before, and I especially noticed two men who appeared to be sheltering themselves from the wind in the doorway of a house some distance up the street. I tried to draw my companion’s attention to them; but he gave a little ejaculation of impatience, and continued to stare into the street. More than once he fidgeted with his feet and tapped rapidly with his fingers upon the wall. It was evident to me that he was becoming uneasy, and that his plans were not working out altogether as he had hoped.