You may begin at the western frontier of Kentucky on the Mississippi River, about five hundred miles away, and travel steadily eastward across the billowy plateau of the State, going up and up all the time until you come to its base, and above its base it rises to the height of some three thousand feet. For miles before you reach it you discover that it is defended by a zone of almost inaccessible hills with steep slopes, forests difficult to penetrate, and narrow jagged gorges; and further defended by a single sharp wall-like ridge, having an elevation of about twenty-two hundred feet, and lying nearly parallel with it, at a distance of about twenty miles. Or, if you should attempt to reach this wall from the south, you would discover that from that side also it is hardly less hostile to approach. Hence it has stood in its virgin wilderness, a vast isolating and isolated barrier, fierce, beautiful, storm-racked, serene; in winter, brown and gray, with its naked woods and rifts of stone, or mantled in white; in summer, green, or of all greens from darkest to palest, and touched with all shades of bloom; in autumn, colored like the sunset clouds; curtained all the year by exquisite health-giving atmospheres, lifting itself all the year towards lovely, changing skies. Understand the position of this natural fortress-line with regard to the area of Kentucky. That area has somewhat the shape of an enormous flat foot, with a disjointed big toe, a roughly hacked-off ankle, and a missing heel. The sole of this huge foot rests solidly on Tennessee, the Ohio River trickles across the ankle and over the top, the big toe is washed entirely off by the Tennessee River, and the long-missing heel is to be found in Virginia, never having been ceded by that State. Between the Kentucky foot and the Virginia heel is piled up this immense, bony, grisly mass of the Cumberland Mountain, extending some three hundred miles north-east and south-west.