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0540	Southern Tibet : vol.3
南チベット : vol.3

The pass is called Ding-la or Chargo-ding-la, and its height is 5 885 m. To the
north the view is hidden by mountains close at hand. To the S.E., S. and S.W.
is the not very high water-parting range of Surnge, with eternal snow on some of
its peaks. Between the Ding-la and Surnge ranges the country is a confusion of
hills and ridges. Comparatively near, to the S.E., is a group with eternal snow
and small glaciers; S. 31° E. is the valley Shiri-marmo; S. 25° E. is the valley
Tsomra; S. 22° E. a snowy peak; S. 15° E. the ice-filled valley of Da-teri; direct
south is the small lake of Argok-tso, and south of it opens a valley called Dar-
kyang; west of the lake is the valley Tsalung, and in our vicinity, S. 20° W., a
place called Dobo-martsong.
Ding-la lies in granitic porphyry; a little rock in the valley south of the pass
consists of diabas-porphyrite; the descent is steep; from the left enter several
tributaries, the greatest of which is Longgyo; they are all right tributaries to the
Aong-tsangpo. To the S.W. appears a small snowy peak. Luma-nakpo, Camp
446, is at 5 138 m.
Just south of this camp the river Argok-tsangpo flows to the N. 24° W. It
had (July 9th) 5 cub. m of water and receives a tributary of 2¹/₂ cub. m from con-
siderable snowfields and small glaciers on the S.W. side of the Ding-la range. The
deep and narrow valley in which it pierces this range is visible to the N.N.W. It
seems curious that the road does not follow that valley instead of forcing the high
Ding-la pass, but either the valley makes too long a detour to the west, or it is
impracticable for traffic.
The country between my sixth and seventh crossings is unknown, and I could
not get any reliable information regarding the source of the Aong-tsangpo, the river
which joins the Lavar-tsangpo. Some informants affirmed that the Argok-tsangpo
joined the Aong-tsangpo at Aong-dunker, others that the Argok-tsangpo was the
same river which lower down was called Aong, after having received some more
tributaries. However, the Argok-tsangpo comes from the Argok-tso, a little lake
which was left to the S.E. of our route, into which several tributaries seem to flow
from surrounding mountains. The lake is surrounded by hills; at the left side of
the river is a terrace 5 m high. From the west a little river, Surnge-chu, enters
the lake; on its bank, Camp 447 has a height of 5 155 m; the fresh-water lake
Argok-tso thus still belongs to the hydrographical system of Nganglaring-tso.
The Surnge valley is broad and flat, between rounded hills covered with snow
even in the middle of summer; the rise of the valley is very gradual and the river
forms, as it were, a series of small lakes; from the sides enter several small brooks;
at one place the valley is divided by a hill. From the N.W. enters a tributary,
Takche, at the lower course of which Camp 448 has a height of 5 281m. The rock
here is granitic porphyry, and the same rock prevails on the pass. This water-
parting between the Satlej and the plateau-land is very extraordinary. Proceeding
south-westwards from Takche one has the impression of going through a great open

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国立情報学研究所 - ディジタル・シルクロード・プロジェクト 『東洋文庫所蔵』貴重書デジタルアーカイブ

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国立情報学研究所 - ディジタル・シルクロード・プロジェクト
『東洋文庫所蔵』貴重書デジタルアーカイブ