limits of my view consequently more ample than any which I had hitherto enjoyed.
I advanced to the outer verge of the hill, which I found to overlook a steep, no less inaccessible, and a glen equally profound. I changed frequently my station in order to diversify the scenery. At length it became necessary to enquire by what means I should return. I traversed the edge of the hill; but on every side it was equally steep, and always too lofty to permit me to leap from it. As I kept along the verge, I perceived that it tended in a circular direction, and brought me back at last to the spot from which I had set out. From this inspection it seemed as if return was impossible by any other way than that through the cavern.
I now turned my attention to the interior space. If you imagine a cylindrical mass, with a cavity dug in the centre, whose edge conforms to the exterior edge; and if you place in this cavity another cylinder, higher than that which surrounds it, but so small as to leave between its sides and those of the cavity a hollow space, you will gain as distinct an image of this hill as words can convey. The summit of the inner rock was rugged, and covered with trees of unequal growth. To reach this summit would not render my return easier; but its greater elevation would extend my view, and perhaps furnish a spot from which the whole horizon was conspicuous.
As I had traversed the outer, I now explored the inner edge of this hill. At length I reached a spot where the chasm, separating the two rocks, was narrower than at any other part. At first view it seemed as if it were possible to leap over it; but a nearer examination showed me that the passage was impracticable. So far as my eye could estimate it, the breadth was thirty or forty feet. I could scarcely venture to look beneath; the height was dizzy, and the walls, which approached each other at top, receded at the bottom, so as to form the resemblance of an immense hall lighted from a rift, which some convulsion of nature had made in the roof. Where I stood there ascended a perpetual mist, occasioned by a torrent that dashed along the rugged pavement below.
