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

the Lapchung range. The valley of the river continues to the N. 72° W. Finally
the river, in a rather narrow passage, pierces the Teri-nam range and turns N. and
E. and empties itself into the lake. The river, which also is called Nyaga-tsangpo
or Soma-nyaga-tsangpo, was (May 17) divided into four very shallow branches, with
about 8 cub. m of water a second. After rain it is unfordable.

Continuing N.E.-wards the road crosses a secondary threshold, Lachung-la.
Camp 408 is situated at a spring, Daksha-lungpa on a height of 5 150 m. The
rocks consist of marble, sandstone and black schist.

Dongchen-la, or Dong-la, 5 113 m, is secondary and situated in quartz-por-
phyry. On its northern side the valley Yung-nagring goes, with a small brook, to
the N.N.E. The surrounding country is called Naktsang-mayma and Naktsang-sange;
to the east is Ngamo-buk; north of Dongchen-la the country was said to be called
Nyaga-changma. The mountains on both sides are comparatively low and consist
of quartz-porphyry. At Camp 409, 4 714 m high, well developed beach-lines indi-
cate the former existence of a lake, which has now left only some swamps in its
old depression.

From Camp 409 the direction becomes N. W. up a little valley to the pass
Teta-la, 4 958 m. The valley is narrow, arid and dry; sandy schist, quartzite and
granite prevail in the surrounding mountains. The view from Teta-la reaches very
far and gives a strong impression of the general uniformity of the mountains, where
only here and there higher snowy groups rise above the rest. The lake Teri-nam-
tso is seen stretching two short days to the east and two days to the west, be-
coming narrower eastwards and being at its broadest towards the N.W. The desicca-
tion lines are extremely sharp, in different colours and tones, and round the water-line
there is a narrow belt of white salt. At the southern shore is a lagoon, green with
algæ, and called Dakba-tso. West of it is a comparatively deep gulf between the
two capes visible to the N.W. and N. 17° W.; to the N. 9° E. is a red promontory
called Domar or Dongar, and to the N. 18° E. another called Sonyak; Kokchen,
Kokchung, Rapta and Kyüti are parts of the small ridges following the southern
shore eastwards. Direct N.E., at the northern shore, is an island called Tibu-kare
or Nam-do, "the sky stone", to which the nomads go out on the ice during the
winter; the shore opposite the island is called Toba-kapchen. At a great distance
to the N. 18° E. is a small snowy mountain, and N. 30° E. a group of flat, snowy
peaks; N. 82° E. is a lower, snowy group and to the N. 89° E. a comparatively
low region north of Targo-gangri, the highest summit of which is to be seen to
the S. 80° E. From this point, or the west, the Targo-gangri presents itself as a
very sharply defined range with a series of peaks, not much higher than the crest.
To the S. 69° E. is a smaller snowy mountain, and S.E. several others belonging to
the Transhimalaya, that is to say, to the ranges west of Shuru-tso. In that direc-
tion the highest mountains are visible; to the N.W. high peaks are rare, only to the
N. 52° W. is one visible, though not of considerable height, but N. 31° W. there is the