“Not he. He had found one or two objects which made me almost certain that his house was built on the entrance to such a place. So I rented it from him, and did my excavations for myself. Come in, and shut the door behind you.” It was a long, empty building, with the mangers of the cows along one wall. Burger put his lantern down on the ground, and shaded its light in all directions save one by draping his overcoat round it. “It might excite remark if anyone saw a light in this lonely place,” said he. “Just help me to move this boarding.” The flooring was loose in the corner, and plank by plank the two savants raised it and leaned it against the wall. Below there was a square aperture and a stair of old stone steps which led away down into the bowels of the earth. “Be careful!” cried Burger, as Kennedy, in his impatience, hurried down them. “It is a perfect rabbits’-warren below, and if you were once to lose your way there, the chances would be a hundred to one against your ever coming out again. Wait until I bring the light.” “How do you find your own way if it is so complicated?” “I had some very narrow escapes at first, but I have gradually learned to go about. There is a certain system to it, but it is one which a lost man, if he were in the dark, could not possibly find out. Even now I always spin out a ball of string behind me when I am going far into the catacomb. You can see for yourself that it is difficult, but every one of these passages divides and subdivides a dozen times before you go a hundred yards.” They had descended some twenty feet from the level of the byre, and they were standing now in a square chamber cut out of the soft tufa. The lantern cast a flickering light, bright below and dim above, over the cracked brown walls. In every direction were the black openings of passages which radiated from this common centre.