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 glaciers and diminishing streams, also the fact that all the lakes in this part of Tibet show a large amount of contraction, and to all appearances are still decreasing. On the Yam-dok-tsho several distinct old shores can be traced running round the lake, some quite sixty feet above the present lake level. Pho-mo-chang-thang, Kala-tsho, Bam-tsho, and Rhum-tsho are all drying up. What is the cause of this? Is it the gradual elevation of the Himalayas, shutting out the monsoon current, or has the monsoon current itself diminished? The migration southward might also be accounted for by diminished rainfall, the people being no longer able to support themselves and their cattle on the produce of the land, and being obliged to seek new and more productive country.

It is a very interesting subject, but requires more time and research to be devoted to it than I have been able to give.

At Nelung I lost one of my favourite mules, Kitty, whom I had had for many years, and who had served me well. She must have contracted a chill crossing in the hail, for soon after reaching camp she was taken ill with colic, and nothing I could do was of any use, and she died during the night.

From Nelung my route took me over an easy pass to the Phari-Gyantse road. At Gyantse I spent a few days making a visit of inspection to Bailey, the officiating British Trade Agent and my Assistant Political Officer. The post is a lonely and isolated one, and the work was none too pleasant, owing to the attitude of the Chinese, who did all in their power to be obstructive, and used every possible means to prevent the Tibetans having any direct intercourse with us; but things on the whole were fairly satisfactory. From Gyantse I returned by the ordinary route to Chumbi, and thence to Gangtak, thus bringing to an end my exploration in Bhutan.