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Show C4# 0N OF THE SWEETWATER. 69 it is fouftd on the tops of the hills. The strata seemed perfectly horizontal. At our nooning point yesterday, the carboniferous rooks were found rising up at a considerable angle, but no section was obtained. The only rodk exposed was the red sandstone, which had been rendered partially crystalline by the action of heat. Th6 surrounding rocks had not been disturbed. Softie tads of yery coarse conglomerate were seen cropping out near the river. ' , In the course of the day, Captain Duncan, of the Rifles, who had passed us at Bitter Creek on < the 19th of July, in pursuit of deserters,, cam* into camp, haying followed his mefc to within fifty miles of PortBridger. > He had come upon { hem at daylight, while they lay asleep, disarmed them, secured their horses, and was now on hid return, having taken also another man who hid deserted previously- so that he had five in all. The pursuit was one of gteat hardship, privation, and fatigue, and the energy and perseverance with which it had been continued was the subject of admiration' with all. Encamped on the Sweetwater, at a point where the road leaves it to avoid a cafion above, which is impassable for wagons for several miles. March, in the last two days, forty miles. Saturdayy August 4.- Morning clear and cool. Leaving the train to follow the. beaten track, which makes a short cut over the hills, I determined to follow up- the cafloi* of the Sweetwater. T* he stream, as I had anticipated, was shut up between lofty, rocky eminences, coming down directly to the w& ter at an angle of from 45°> to' 60°, along the sides of which we scrambled, sometimes Walking . and leading our mules over crags where it was impossible to ride, crossing and r'ecrossing the stream ever and anon, to enable our animals to get along at all. A short distance after entering the caflon, the red sandstone was found cropping out at an angle of ,45°, with a dip to the north; and a little farther on the crystalline rocks appeared, forming the sides of the Gallon. The prevailing rock was gneiss; but sienite and granite were found in some places constituting the principal* bulk of the formation. A narrow bottom occasionally gave room for some fine groves of large aspens, the sight of- which, after our lohg and dreary ride without a particle of shade, was truly refreshing. The bed of the rivter was filled with large boulders and fragments of rock which hkd fallen from the cliffs above, among whioh the ,^ ters foamed aqd fretted with a gurgling murmur, which, when |