The trail of the old route, and the one taken by most of the emigrants, leaves Fort Bridger, and pursues a north-westerly course, through the Bear River valley, which it leaves at a remarkable landmark called Sheep Rock, and crossing a dividing ridge reaches Fort Hall, by the valley of the Portneaf River. This fort was established by the Hudson Bay Company, and it is the seat of a considerable trade in furs with the Indians and trappers. From Fort Hall the trail continues on till it reaches the valley of Mary's River. There a tolerably fertile soil and refreshing vegetation greets the eye of the travel-worn emigrant. The trail crosses the river five or six times in as many miles, in order to take advantage of the narrow bottoms made by the windings of the stream. The bottom is skirted by very high ranges of mountains to where the trail leaves it, and turning to the right ascends over low, gravelly hills. Descending from the summit of a ridge of hills, it passes through a valley where good grass and water can be obtained--the valley containing several springs of pure cold water. Emerging from this valley through a narrow gap, the trail passes into another still more extensive, and pursues a south-westerly direction for about twenty miles, keeping near the margin of Mary's River. A succession of low hills are crossed, and another valley is reached. During the journey through these valleys, the emigrants are exposed to the fiery rays of the sun, and the hot winds from the desert are very oppressive. The trail then follows the course of the river in a direction nearly north-west, through valleys, or plains of great extent, and mountainous defiles, occasionally following a bend of the river towards the south-west. The greater portion of these valleys is barren, but there are frequent fertile spots near the boiling springs. The only Indians met on this part of the route are the diggers, and they do not possess the power to do much harm, if they even were hostile; but they are friendly. The want of water is the principal annoyance.