The occurrence of the elm and the diospyros indicated a soil at least approaching towards one adapted to the purposes of agriculture. Among great numbers of interesting plants, we found here a gentian, with a flower much larger than G. crinita, an orobanche (probably the O. ludoviciana, N.) a new croton, an ipomopsis, and many others. Notwithstanding the scarcity of game which we had so long felt, we daily saw considerable numbers of antelopes, with some signs of bear, deer, and turkies; but these animals had acquired all the vigilance which results from the habit of being often hunted, and the entire want of thick forests, and even of solitary trees or inequalities of the surface, to conceal the approach of the hunter, rendered abortive most of our attempts to take them. The common partridge (perdix virginianus) was seen near this encampment; also the dove, which had never disappeared entirely in all the country we had passed. Rising at the customary hour on the morning of the 7th, we perceived that a part of our horses were missing. As we were apprehensive that they had been stolen by Indians, a small party was immediately sent to discover the route they had taken; pursuing along their path, the men overtook them at the distance of two or three miles, as they were straying on in search of pasture. On leaving our camp, we endeavoured to regain the trace on which we had for several days travelled; {285} but though we spent considerable time in the search, and travelled several miles off our course, we were not able to find it. This we had occasion to regret, as the surface of the country is mostly of a loose sand, bearing turfs of wormwood and other plants, rendering the travelling difficult where there is no road. In order to shun the numerous ravines which now began to occur, we chose our route at some distance from the bank of the river, where we found the vallies deeper and more abrupt, though less frequent. In the course of our morning's ride of twenty miles, we saw several gangs of wild horses, and with these we distinguished numbers of colts and some mules. In passing through a village of prairie dogs, of which we saw great numbers, Mr. Peale killed a burrowing owl. The bird, though killed instantly, had fallen into one of the marmot's burrows; but had luckily lodged within the reach of the arm. On opening it, the intestines were found filled with the fragments of grasshoppers' wings, and the hard parts of other insects. We have never been able, from examination, to discover any evidence that these owls prey upon the marmots, whose villages they infest.