Rights of Mountain Passes.—The follow- \ ing statement of the altitude of the several j best known passes across the Sierra Nevada, istaken from a communication in the Cn- | ^ion : \ j‘•The highest mountain passes lie between ! j Lake Bigler and Mono Lake, ami are there- clore light in the track of the great tide ( f travel across the mountains. The hgl es pass w hose altitude is given is the Sonora pass, 10.133 feet, lying between the head waters of the Tuolumne and Walker rivers,and being the first pass north of Mono Lake. Then comes the Western pass, 9,030; then the Carson pass, 7,872;then Johnson’s. 0,732, Which is 1.002 feet above Lake Bigler. The first pass north of this lake is the Truckee pass, 5,030 feet: next is llenness’ pass, the altitude of which has never been taken, but may be set down as not varying much from 5,250 feet. The Yuba gap is next—altitude not taken, but is probably about 5,000 feet. Having Crossed both of the last named passes,’I should judge the Yuba gap was a little the lowest. Then we have Bcckworth’s pass, 4,570 feet, undoubtedly the host pass among them, but which is impracticable for ja route from Marysville, as it lies so far north (nearly due east of Tehama) that it would be more circuitous than by Placerville. An evidence that the summit of the .Sierras de- : sends to the northward is given in the course of the rivers on the eastern slope. Walker, Carson and Truckee rivers all run a northeasterly course from the highest passes above named. South of Mono lake they lake a i southerly course.”i(I (