Nevertheless, it had to be undertaken. So, walking downstairs, I unlocked and opened the library-door, and found, as I anticipated, the room in utter darkness. I examined the fastenings of the shutters--they were secure as I had left them; I looked into the strong-room--not even a rat lay concealed there; I turned the cocks of the gas lights--but no gas whistled through the pipes, for the service to the library was separate from that of the rest of the house, and capable of being shut off at pleasure. I, mindful of the lights said to have been seen emanating from that room, had taken away the key from the internal tap, so that gas could not be used without my knowledge or the possession of a second key. Therefore, as I have said, it was no surprise to me to find the library in darkness. Nor could I say the fact of the light flaring, apparently, from a closely-shut-up room surprised me either. For a long time I had been expecting to see this phenomenon: now, when I did see it, I involuntarily connected the light, the apartment, and the stranger together. For he was no ghost. Ghosts do not leave footmarks behind them in the snow. Ghosts do not break threads of cotton. It was a man I had seen in the garden, and it was my business to trace out the connection between him and the appearances at River Hall. Thinking thus, I left the library, extinguished the candle by the aid of which I had made the investigations stated above, and after lowering the gaslight I always kept burning in the hall, began ascending the broad, handsome staircase, when I was met by the figure of a man descending the steps. I say advisedly, the figure; because, to all external appearance, he was as much a living man as myself. And yet I knew the thing which came towards me was not flesh and blood. Knew it when I stood still, too much stupefied to feel afraid. Knew it, as the figure descended swiftly, noiselessly. Knew it, as, for one instant, we were side by side. Knew it, when I put out my hand to stop its progress, and my hand, encountering nothing, passed through the phantom as through air. Knew, it, when I saw the figure pass through the door I had just locked, and which opened to admit the ghostly visitor--opened wide, and then closed again, without the help of mortal hand. After that I knew nothing more till I came to my senses again and found myself half lying, half sitting on the staircase, with my head resting against the banisters. I had fainted; but if any man thinks I saw in a vision what I have described, let him wait till he reaches the end of this story before expressing too positive an opinion about the matter. How I passed the remainder of that night, I could scarcely tell. Towards morning, however, I fell asleep, and it was quite late when I awoke: so late, in fact, that Mrs. Stott had rung for admittance before I was out of bed.