After descending from the more precipitous parts about the summit of the mountain, they crossed along a rugged tract, buried and rendered almost impassable by boulders and fragments which had fallen from above, and were at length so fortunate as to {194} find a spring of cool water, and a shade, in a narrow ravine; where they sat down to rest and dine on the provision they had brought. The men who were with them stopped in the same ravine, a few rods below. One of these was violently attacked, immediately after drinking of the water, with headache, vomiting, and purging, which increased to such an alarming degree, that he was presently unable to stand upon his feet. As it was feared he would not soon be able to walk, Mr. Peale undertook to return alone to camp, and give notice of his situation, and return with medicine and assistance. He descended along a rough and obstructed ravine, until he arrived at the Platte, but found the valley so confined as to be impassable, and again directed his course towards the north-east, attempting to regain the route which the party had taken in ascending. After a most rugged and fatiguing march of about six miles, he arrived at camp late in the afternoon. Here he found a number of the party suffering in a similar manner, but not so severely as the man he had left in the mountains. Two men were immediately despatched in search of the disabled party. Mr. Peale had left them but a short time, when their attention was called to the noise as of some large animal running up the narrow defile in which they were sitting; on turning round they perceived a large bear advancing at full speed towards the place where they were. Seizing their rifles, they fired upon him at the distance of about ten steps, but the bear, without stopping or turning his head, mounted an almost perpendicular precipice of about thirty feet, and was out of sight in an instant. At this spot, which was several miles within the mountains, and elevated nearly to the limit of phænogamous vegetation, the common hop (H. lupulus) was growing in perfection; also the box elder (acer negundo, Ph.), the common sarsaparilla of the eastern {195} States (aralia nudicaulis), the spikenard (A. vacemora), and many other common plants. After waiting about two hours, they found the sick man so far recovered as to be able to stand upon his feet and walk a little. They therefore relieved him of his gun and other luggage, and moved by short stages towards camp, where they arrived at a late hour in the evening.[145]