In proof of the great muscular power with which this animal is endowed, a circumstance related to us by Mr. J. Dougherty may be stated. He shot down a bison; and leaving the carcass to obtain assistance to butcher it, he was surprised on his return to find that it had been dragged entire, to a considerable distance, by one of these bears, and was now lodged in a concavity of the earth, which the animal had scooped out for its reception. Notwithstanding the formidable character of this bear, we have not made use of any precautions against their attacks; and although they have been several times prowling about us in the night, they have not evinced any disposition to attack us at that season. They appear to be more readily intimidated by the voice, than by the appearance of men. Some grizzly bears were brought, when very young, from the country of the Sioux by Lieutenant Pike, and were presented to the Philadelphia Museum. They were kept several years in that splendid institution, secured in a strong cage; during which time they gradually increased in size, until at length they became dangerous from their strength and unsubdued ferocity, and it was judged proper to prepare them for the cabinet. From these specimens our description is chiefly taken.[33] {245} CHAPTER III {X} Natural Mounds--Kaskaia Indian and Squaw--Preparations for a Division of the Party--Sandstones of the High Plains South of the Arkansa--Fletz Trap Formation. In the afternoon of the 19th of July we passed the mouth of the river St. Charles, called by Pike the Third Fork, which enters the Arkansa from the south-west. It is about twenty yards wide; and receives, eight miles above its confluence, the Green Horn creek, a small stream from the south-west. The Green Horn rises in the mountains, and passes between the Spanish peaks into the plains. These two peaks had been for several days visible, standing close to each other, and appearing entirely insulated. If they are not completely so, the other parts of the same range fall far below them in point of elevation. They are of a sharp conic form, and their summits are white with snow at midsummer.[34] This day we travelled twenty-five miles, the general direction of our course being a little south of east, and encamped at five P. M. in a grassy point on the north side of the river. The soil of the islands and the immediate valley of the river were found somewhat more fertile than above. Immediately after encamping, the hunters were sent out, who soon returned with two deers and a turkey. In the evening the altitude of Antares was taken. Throughout the night we were much annoyed by mosquitos, the first we had met for some weeks in sufficient numbers to be troublesome.