The range dividing Horba Kangri and Gar from Seng is perhaps longer, though our positive knowledge of it does not exceed 150 miles, approximately S.E.
and N.W., from Maryum-La to South-Hangrang, through Horba Kangri and Guge, expanded to a great breadth in Guge, and narrowed about Kangri by the encroachment of Purang, which is a separate valley descending to the Indian Himalaya of Naipal.
The basin of the Langchen is lacustrine in its upper part, containing the Konkyu Lake in Horba without active effluence, and Tso Mapham and Langnak in Kangri with a partial or intermittent one.
White River) from the Indian Himalaya on the S., the Ser-Chu (Gold River) or other streams from the mountains of Kangri on the N., and the effluence from the lakes Mapham and Langak on the E.; the two first being permanent, and the last partial or intermittent; and besides these, there is the dormant drainage of the Horba basin, which stagnates in the Lake of Konkyu on the extreme S.E.
half of this, comprising the valley of Horba, contains the Tso Konkyu, lying immediately under the W.