Carnacki, The Ghost Finder

w seemed ridiculously dim by contrast with the tremendous blaze of the flash-power.... And then, as I stooped forward, staring and listening, there came the crashing thud of the door of the Grey Room. The sound seemed to fill the whole of the large corridor, and go echoing hollowly through the house. I tell you, I felt horrible--as if my bones were water. Simply beastly. Jove! how I did stare, and how I listened. And then it came again--thud, thud, thud, and then a silence that was almost worse than the noise of the door; for I kept fancying that some awful thing was stealing upon me along the corridor. And then, suddenly, my lamp was put out, and I could not see a yard before me. I realized all at once that I was doing a very silly thing, sitting there, and I jumped up. Even as I did so, I thought I heard a sound in the passage, and quite near me. I made one backward spring into my room, and slammed and locked the door. I sat on my bed, and stared at the door. I had my revolver in my hand;