Hitherto I had been able to detect the presence of this panel only by my sense of touch and by means of a faint draught which blew through it; now it suddenly became clearly perceptible. I found myself looking into what was evidently the principal room of the house—a dreary apartment with tatters of paper hanging from the walls and litter of all sorts lying about upon the floor and in the rusty fireplace.

Some one had partly raised the front window and opened the shutters. A patch of moonlight shone down upon the floor immediately below my hiding-place and furthermore enabled me vaguely to discern the disorder of the room.

A bulky figure showed silhouetted against the dirty panes. It was that of a man who, leaning upon the window sill, was peering intently in. Silently he had approached, and silently had raised the sash and opened the shutters.

For thirty seconds or more he stood so, moving his head from right to left … and I watched him through the broken panel, almost holding my breath with suspense. Then, fully raising the window, the man stepped into the room, and, first reclosing the shutters, suddenly flashed the light of an electric lamp all about the place. I was enabled to discern him more clearly, this mysterious spy who had tracked us from the moment that we had left the hotel.

He was a man of portly build wearing a heavy fur-lined overcoat and having a soft felt hat, the brim turned down so as to shade the upper part of his face. Moreover, he wore his fur collar turned up, which served further to disguise him, since it concealed the greater part of his chin. But the eyes which now were searching every corner of the room, the alert, dark eyes, were strangely familiar. The black mustache, the clear-cut, aquiline nose, confirmed the impression.

Our follower was M. Samarkan, manager of the New Louvre.

I suppressed a gasp of astonishment. Small wonder that our plans had leaked out. This was a momentous discovery indeed.

And as I watched the portly Greek who was not only one of the most celebrated mâitres d'hôtel in Europe, but also a creature of Dr. Fu-Manchu, he cast the light of his electric lamp upon a note attached by means of a drawing-pin to the inside of the room door. I immediately divined that my friend must have pinned the note in its place earlier in the day; even at that distance I recognized Smith's neat, illegible writing.

Samarkan quickly scanned the message scribbled upon the white page; then, exhibiting an agility uncommon in a man of his bulk, he threw open the shutters again, having first replaced his lamp in his pocket, climbed out into the little front garden, reclosed the window, and disappeared!

A moment I stood, lost to my surroundings, plunged in a sea of wonderment concerning the damnable organization which, its tentacles extending I knew not whither, since new and unexpected limbs were ever coming to light, sought no less a goal than Yellow dominion of the world! I reflected how one man—Nayland Smith—alone stood between this powerful group and the realization of their project … when I was aroused by a hand grasping my arm in the darkness!