I crept forward and looked across at the familiar window. As my eyes fell upon it, I gave a gasp and a cry of amazement. The blind was down, and a strong light was burning in the room. The shadow of a man who was seated in a chair within was thrown in hard, black outline upon the luminous screen of the window. There was no mistaking the poise of the head, the squareness of the shoulders, the sharpness of the features. The face was turned half-round, and the effect was that of one of those black silhouettes which our grandparents loved to frame. It was a perfect reproduction of Holmes. So amazed was I that I threw out my hand to make sure that the man himself was standing beside me. He was quivering with silent laughter.