I cared a great deal for the much more formidable person who was behind
him, the bosom friend of Moriarty, the man who dropped the rocks over
the cliff, the most cunning and dangerous criminal in London. That is
the man who is after me to-night Watson, and that is the man who is
quite unaware that we are after him."

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 passers-by. 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. At last, as midnight approached and
the street gradually cleared, he paced up and down the room in
uncontrollable agitation. I was about to make some remark to him, when
I raised my eyes to the lighted window, and again experienced almost as
great a surprise as before. I clutched Holmes's arm, and pointed upward.

"The shadow has moved!" I cried.