In the southern part of California, near the Arizona line, is the famous Death Valley—a tract of arid, alkaline plain hemmed in by steep mountains and lying below the level of the sea. For years it was believed that no human being could cross that desert and live, for horses sink to their knees in drifts of soda dust; there is no water, though the traveller requires much drink; and the heat is terrific. Animals that die in the neighborhood mummify, but do not decay, and it is surmised that the remains of many a thoughtless or ignorant prospector lie bleached in the plain. On the east side of Dead Mountain are points of whitened rock that at a distance look like sheeted figures, and these, the Indians say, are the ghosts of their brethren.