Rambles In the Mammoth Cave

"On my first visit to the Mammoth Cave in 1813, I saw a relic of ancient times, which requires a minute description. This description is from a memorandum made in the Cave at the time. "In the digging of saltpetre earth, in the short cave, a flat rock was met with by the workmen, a little below the surface of the earth in the Cave; this stone was raised, and was about four feet wide and as many long; beneath