At one corner of the room was a heavy door. I tried it, for, since I could not find the key of the room or the key of the outer door, which was the main object of my search, I must make further examination, or all my efforts would be in vain. It was open, and led through a stone passage to a circular stairway, which went steeply down.

I descended, minding carefully where I went for the stairs were dark, being only lit by loopholes in the heavy masonry. At the bottom there was a dark, tunnel-like passage, through which came a deathly, sickly odour, the odour of old earth newly turned. As I went through the passage the smell grew closer and heavier. At last I pulled open a heavy door which stood ajar, and found myself in an old ruined chapel, which had evidently been used as a graveyard. The roof was broken, and in two