"Packhorses ain't usually shod before and behind," said the Virginian; and sliding to the ground he touched the footprints. "They are not four hours old," said he. "This bank's in shadow by one o'clock, and the sun has not cooked them dusty."

We continued on our way; and although it seemed no very particular thing to me that a man should choose to walk and lead his horse for a while,--I often did so to limber my muscles,--nevertheless I began to catch the Virginian's uncertain feeling about this traveller whose steps had appeared on our path in mid-journey, as if he had alighted from the mid-air, and to remind myself that he had come over the great face of rock from another trail and thus joined us, and that indigent trappers are to be found owning but a single horse and leading him with their belongings through the deepest solitudes of the mountains--none of this quite brought back to me the comfort which had been mine since we left the cottonwoods out of sight down in the plain. Hence I called out sharply, "What's the matter now?" when the Virginian suddenly stopped his horse again.