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| 0352 |
Southern Tibet : vol.2 |
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the precaution to say only: ¹ ›The sources of the Yeru Tsangpo have not been vi-
ited as yet, though they have been pretty-accurately located‹, by which he can only
mean MONTGOMERIE's co-ordinates for the place, which take us back to Tamlung-la.
Sir THOMAS HOLDICH holds the other view, for he talks of ›the upper Brahma-
putra at its source on the Marium La (15,500) — the meridional water parting
between the Indus and the Brahmaputra.‹² This view was not altered by Ryder's
journey, which is quoted in the work.³
Then comes Ryder's admirable survey. We shall have to return to his map
here below. In the text he only says: ⁴ ›We now (from Tradum) followed the river
valley for a week or so, always in the same large plains, until we could see the
watershed range ahead of us, from the valleys of which innumerable streams issue
to form the Tsangpo, the largest coming from a snowy range to the south-west.‹
Beyond the Maryum La (16,900 feet) he adds: ›We had now finished with the Tsangpo,
having surveyed it from Shigatse to its source.‹
Even this description is not quite clear. It practically gives the same as Nain
Sing, except that the main source should be on the Tamlung-la. One gets the im-
pression that the source is regarded as situated on the Maryum-la, and so Holdich's view
is quite easy to understand. But Ryder adds an important observation, namely, that
amongst the innumerable streams forming the Tsangpo the largest comes from a
snowy range to the S.W. It is true that Nain Sing had already seen this range and
understood that its glaciers supplied the river with the greatest part of its water.
But Ryder precised the question by talking especially of one large stream, which
cannot have been any other than the Kubi-tsangpo.
On the same occasion RAWLING says: ⁵ ›This proved to be our last day
amongst the plains of the Brahmaputra, for all that now remained of the great river
were numerous channels, which in the rainy season drained the neighbouring hills.
The main tributary lay to the south, and obviously terminated in a similar manner.‹
It is not clear what he means by this termination in a similar manner. But he clearly
calls the large stream from the south a tributary. And this is wrong for what he
calls the ›main tributary‹ is in reality the Brahmaputra itself.
The question: which ›channel‹ is the main river and where is the source? was
thus by no means settled.⁶
Ryder has, however, clearly pointed out his standpoint in a very sympathetic
article, which he wrote after our personal meeting at Simla, in September 1908.⁷
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