Page:The City of the Saints.djvu/97

Rh where the skeleton of an "elephant" had been lately discovered. On the summit he pointed out, far over many a treeless hill and barren plain, the famous Black Hills and Laramie Peak, which has been compared to Ben Lomond, towering at a distance of eighty miles. The descent was abrupt, with sudden turns round the head of earth-cracks deepened to ravines by snow and rain; and one place showed the remains of a wagon and team which had lately come to grief. After galloping down a long slope of twelve miles, with ridgelets of sand and gravel somewhat raised above the bottom, which they cross on their way to the river, we found ourselves, at 5 30 P.M., once more in the valley of the Platte. I had intended to sketch the Bluffs more carefully from the station, but the western view proved to be disappointingly inferior to the eastern. After the usual hour's delay we resumed our drive through alternate puffs of hot and cold wind, the contrast of which was not easy to explain. The sensation was as if Indians had been firing the prairies—an impossibility at this season, when whatever herbage there is is still green. It may here be mentioned that, although the meteorology of the earlier savans, namely, that the peculiar condition of the atmosphere known as the Indian summer might be produced by the burning of the plain-vegetation, was not thought worthy of comment, their hypothesis is no longer considered trivial. The smoky canopy must produce a sensible effect upon the temperature of the season. "During a still night, when a cloud of this kind is overhead, no dew is produced; the heat which is radiated from the earth is reflected or absorbed, and radiated back again by the particles of soot, and the coating of the earth necessary to prevent the deposition of water in the form of dew or hoar-frost is prevented." According to Professor Henry, of Washington, "it is highly probable that a portion of the smoke or fog-cloud produced by the burning of one of the Western prairies is carried entirely across the eastern portion of the continent to the ocean."

Presently we dashed over the Little Kiowa Creek, forded the Horse Creek, and, enveloped in a cloud of villainous musquetoes,