I was deeply impressed by the changing beauties of this strange Kentucky scenery, but marveled at the fact that while I became light-hearted and enthusiastic, my guide grew correspondingly despondent and gloomy. From time to time he lapsed into thoughtful silence, and once I caught his eye directed toward me in a manner that I inferred to imply either pity or envy. We passed Biswell's Bluff, and left the Cumberland River at its upper extremity, where another small creek empties into the river. Thence, after ascending the creek some distance, we struck across the country, finding it undulating and fertile, with here and there a small clearing. During this journey we either camped out at night, or stopped with a resident, when one was to be found in that sparsely settled country. Sometimes there were exasperating intervals between our meals; but we did not suffer, for we carried with us supplies of food, such as cheese and crackers, purchased in Smithland, for emergencies. We thus proceeded a considerable distance into Livingston County, Kentucky. I observed remarkable sinks in the earth, sometimes cone-shaped, again precipitous. These cavities were occasionally of considerable size and depth, and they were more numerous in the uplands than in the bottoms. They were somewhat like the familiar "sink-holes" of New York State, but monstrous in comparison. The first that attracted my attention was near the Cumberland River, just before we reached Biswell's Hill. It was about forty feet deep and thirty in diameter, with precipitous stone sides, shrubbery growing therein in exceptional spots where loose earth had collected on shelves of stone that cropped out along its rugged sides. The bottom of the depression was flat and fertile, covered with a luxuriant mass of vegetation. On one side of the base of the gigantic bowl, a cavern struck down into the earth. I stood upon the edge of this funnel-like sink, and marveled at its peculiar appearance. A spirit of curiosity, such as often influences men when an unusual natural scene presents itself, possessed me. I clambered down, swinging from brush to brush, and stepping from shelving-rock to shelving-rock, until I reached the bottom of the hollow, and placing my hand above the black hole in its center, I perceived that a current of cold air was rushing therefrom, upward. I probed with a long stick, but the direction of the opening was tortuous, and would not admit of examination in that manner. I dropped a large pebble-stone into the orifice; the pebble rolled and clanked down, down, and at last, the sound died away in the distance. "I wish that I could go into the cavity as that stone has done, and find the secrets of this cave," I reflected, the natural love of exploration possessing me as it probably does most men.