Excerpt: We stand on the loftiest peak of the Big Wind River Mountains, that highest and longest chain of the Northern Rockies, a chaos of granite fifteen thousand feet towards the firmament from the sea. Around us the lesser pinnacles hold up heads as fantastic in shape as an Indian's plumed for battle, and, below a little, diamonds of ice deck the snowy ermine of the colossal giant's robe. Far beneath, the mosses are grown upon by sparse grasses, and they by scrub evergreens, gradually displaced in the descent to the warm alcoved valleys by taller and taller pines, spruce, larch, and cedar. But the ancient ocean wash here shows lines alone of the constant west and southwest winds, which never bring a seed or grain into this calm frigidity. In the placid afternoon, the beats are audible of the wings of the king of the air, that proud eagle which Milton chose as the finest emblem of the American people who, in their vigorous youth, had lit their eyes in the unclouded sunbeams; and the song of the Arctic bluebird, startled by the unwonted squeaking of the dry ice powder intermixed with ground fossils and granite, as horses in the uneven line of a new and breakneck trail crunch antediluvian shells to atoms as they follow a daring man up the heights along chasms of ten thousand feet, from the western acclivity to the actual summit divide, not two yards wide. It was November, a time when the almost impossible crossing was alone in the power of man, since in the thaws of summer the ravines are choke full of resistless water, and, later, the snowstorms are overwhelming.