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| 0397 |
Southern Tibet : vol.2 |
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CHAPTER XL.
NAIN SING AND THE TSANGPO.
We have dealt with NAIN SING's survey of the sources of the Tsangpo.¹
Some 40 miles S.E. of Tamjan he crossed the first large tributary, Chu-Nago,
which comes from the north; ²intermediately only two small tributaries were noticed. ²
From Chu-Nago the Tsangpo was found to flow S.E. and 50 miles lower down it
received a large tributary, Chachu Sangpo, coming from the north; it was about
200 paces wide, ²and not very much inferior to the Brahmaputra itself².
From Chachu the Tsangpo is said to flow 4 or 5 miles due south, then it
continues S.E. for 30 miles, makes a great bend to the south, receives the Shorta
Sangpo from the southern mountains, and, after having turned N.E. again, receives
the Charta Sangpo, which, in October, was some 250 paces broad, while its tributary,
the Chaka Chu, was 150 paces broad. The combined Charta Sangpo was one of
the largest, if not the largest of all the tributaries he saw. In May it was very
slightly swollen and had ice clinging to the edges.
From here the Tsangpo was observed to flow some 40 miles a little south of
east. Thence to a point above Lhatse-dsong, Nain Sing left the Sangpo. This bit
of about 100 miles remained unknown until RYDER mapped the course some 40 years
later. Near Lhatse-dsong, his Janglache, the Tsangpo flows N.E. to meet ²a very
large river, called the Raka Sangpo². Nain Sing followed the Raka Sangpo from the
Gur-la to Nabring lake. ²At this place it was a large river, but when seen again lower
down, at its junction with the Brahmaputra, the Raka Sangpo had become very much
larger, having evidently received a large addition by one or more tributaries from
the north.² Its breadth was estimated at 200 paces. From here his companions
took boat to Shigatse, while Nain Sing himself followed the southern bank of the
Tsangpo, ²crossing a good-sized tributary from the south². Sometimes he could see
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