“At this instant a horrible change came over his expression; his eyes stared wildly, his jaw dropped, and he yelled, in a voice which I can never forget, ‘Keep him out! For Christ’s sake keep him out!’ We both stared round at the window behind us upon which his gaze was fixed. A face was looking in at us out of the darkness. We could see the whitening of the nose where it was pressed against the glass. It was a bearded, hairy face, with wild cruel eyes and an expression of concentrated malevolence. My brother and I rushed towards the window, but the man was gone. When we returned to my father his head had dropped and his pulse had ceased to beat.

“We searched the garden that night, but found no sign of the intruder, save that just under the window a single footmark was visible in the flower-bed. But for that one trace, we might have thought that our imaginations had conjured up that wild, fierce face. We soon, however, had another and a more striking proof that there were secret agencies at work all round us. The window of my father’s room was found open in the morning, his cupboards and boxes had been rifled, and upon his chest was fixed a torn piece of paper, with the words ‘The sign of the four’ scrawled across it. What the phrase meant, or who our secret visitor may have been, we never knew. As far as we can judge, none of my father’s property had been actually stolen, though everything had been turned out. My brother and I naturally associated this peculiar incident with the fear which haunted my father during his life; but it is still a complete mystery to us.”

The little man stopped to relight his hookah and puffed thoughtfully for a few moments. We had all sat absorbed, listening to his extraordinary narrative. At the short account of her father’s death Miss Morstan had turned deadly white, and for a moment I feared that she was about to faint. She rallied however, on drinking a glass of water which I quietly poured out for her from a Venetian carafe upon the side-table. Sherlock Holmes leaned back in his chair with an abstracted expression and the lids drawn low over his glittering eyes. As I glanced at him I could not but think how on that very day he had complained bitterly of the commonplaceness of life. Here at least was a problem which would tax his sagacity to the utmost. Mr. Thaddeus Sholto looked from one to the other of us with an obvious pride at the effect which his story had produced, and then continued between the puffs of his overgrown pipe.