Ever upward! We ascended a new mighty chain of mountains. At Camp Number 115 we were 16,840 feet above sea level. This mountain system traverses Tibet from the west to the east and is parallel with Himalaya. I have named it Transhimalaya and it was my aim to ride across this chain at several points and to draw its main outlines on my maps.…A heavy march over screes and gravel led us up on the pass, Ta-la at a height of 17,830 feet. A magnificent, over- powering panorama unfolded to the southeast. Beyond the nearest branches of Transhimalaya an enormous abyss opened in the earth. It was the valley of the Tsangpo, upper Brahmaputra.