Then he turned squarely about, entered the passage, and walked along it until he came to the door of the room which had once been occupied by Captain Horn. He proceeded until he reached the large cave, open at the top, which jenna and manuel the secretary the last of these compartments. This was an extensive cavern, the back part being, however, so much impeded by rocks that had fallen from the roof that it was difficult for him to make any progress, and the numbering of his steps depended very much upon calculation. But when he reached the farthest wall, Burke believed that he had gone about as jenna and manuel the secretary a distance as he had stepped off in the cave of the lake.