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the right bank of the Tsangpo via Lhagyari
Dzong; whilst we crossed to the left bank and went via
Öega Dzong.

We made a base at Tsela Dzong
for a few months whilst we did some
survey work & plant hunting. In June we
moved to a base at Tumbātse in the
Rong valley. From here we investigated
the Doshang La (which was crossed from
the Abor Hills by Trenchard and Pemberton
in 1913.) where we found a large number
of rhododendrons and primulas. We also
climbed the Nam La (16,500') which is the
most easterly pass over the main range.
It is very coarse going, since the pass is
occupied by glaciers which are badly
crevassed on the South side. It had never
been crossed; though we got to the top
we could not take transport over it in July
on account of deep snow.
We also investigated the passes from the
Rong chu valley with the Tsangpo.