haze or fog obscures objects in the pure and transparent atmosphere of this lofty region. To those accustomed only to the murky air of the seaboard, no correct judgment of -distance can be formed by sight, and objects which they think they can reach in a two hours' walk may be a day's travel away; and though the evening air is a better conductor of sound, on the high plain during the day the report of the loudest rifle sounds little louder than the bursting of a cap; and while the report can be heard but a few hundred yards, the smoke of the discharge may be seen for miles. So extended is the view from the bluff on which the hunters stand, that the broad river glowing under the morning sun like a sheet of silver, and the broader emerald valley that borders it, stretch away in the distance until they narrow at almost two points in the horizon, and when first seen, the vast pile of the Wind River Mountains though hundreds of miles away, looks clear and distinct as a white cottage on the plain.
We are full six miles away from the line of march; though everything is dwarfed by distance, it is seen distinctly. The caravan has been about two hours in motion and is now as widely extended as a prudent regard for safety will permit. First, near the bank of the shining river is a company of horsemen; they seem to have found an obstruction, for the main body has halted while three or four ride rapidly along the bank of the creek or slough. They are hunting a favorable crossing for the wagons; while we look they have succeeded; it has apparently required no work to make it passable, for all but one of the party have passed on, and he has raised a flag, no doubt a signal to the wagons to steer their course to where he stands. The leading teamster sees him, though he is yet two miles off, and steers his course directly towards him, all the wagons following in his
