It’s a perpendicular scramble, built by boring a hole in solid rock about 350 feet deep and filling it full of boulders as big as Bedloe’s Island. We were assembled somewhere near the eternal fires when William the Guide said he would show us the Corkscrew. We thought we knew William, and trusted him, but he abused our confidence. First, a long and perpendicular ladder. Then we were turned loose at the bottom of the great well, and dug our way out through 350 feet of boulders, always upwards towards the surface, each following the the other’s heels until twisted out of all shape and semblance of humanity, we gathered as mournful wrecks in the vast amphitheatre or lobby of the cave, and when at last the guide unbarred the prison gate of the cavern, and we saw the glorious sunlight and bathed in the limpid stream which flows in the wild wood near by, we were glad we were alive.
1890. Anonymous. 1890. Mammoth Cave, Ky. (p. 100). Dietetic and Hygienic Gazette, Volume 6, Issue 5 . Published by Gazette Publishing Company, 1890. [Amusing description of a trip through the Corkscrew with William Garvin] http://books.google.com/books?id=bnHlAAAAMAAJ&dq