From the dining-room above I could hear the pleasant tones of a voice in easy conversation. On the ground floor all was not only profoundly silent, but the darkness seemed to weigh upon my eyes. Here, then, I stood for some time, having thrust myself uncalled into the utmost peril, and being destitute of any power to help or interfere. Nor will I deny that fear had begun already to assail me, when I became aware, all at once and as though by some immediate but silent incandescence, of a certain glimmering of light upon the passage floor. Towards this I groped my way with infinite precaution; and having come at length as far as the angle of the corridor, beheld the door of the butler’s pantry standing just ajar and a narrow thread of brightness falling from the chink. Creeping still closer, I put my eye to the aperture. The man sat within upon a chair, listening, I could see, with the most rapt attention. On a table before him he had laid a watch, a pair of steel revolvers, and a bull’s-eye lantern. For one second many contradictory theories and projects whirled together in my head; the next, I had slammed the door and turned the key upon the malefactor. Surprised at my own decision, I stood and panted, leaning on the wall. From within the pantry not a sound was to be heard; the man, whatever he was, had accepted his fate without a struggle, and now, as I hugged myself to fancy, sat frozen with terror and looking for the worst to follow. I promised myself that he should not be disappointed; and the better to complete my task, I turned to ascend the stairs. The situation, as I groped my way to the first floor, appealed to me suddenly by my strong sense of humour. Here was I, the owner of the house, burglariously present in its walls; and there, in the dining-room, were two gentlemen, unknown to me, seated complacently at supper, and only saved by my promptitude from some surprising or deadly interruption. It were strange if I could not manage to extract the matter of amusement from so unusual a situation. Behind this dining-room, there is a small apartment intended for a library. It was to this that I cautiously groped my way; and you will see how fortune had exactly served me. The weather, I have said, was sultry; in order to ventilate the dining-room and yet preserve the uninhabited appearance of the mansion to the front, the window of the library had been widely opened, and the door of communication between the two apartments left ajar. To this interval I now applied my eye.