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

north and Tangdi-shalung from the south. Pema-lachung is a pass in the southern
range leading to Tradum; its valley is called Yele-ngunchung.
We now follow the northern bank of the Tingchung-hlonga; Serbuk and
Ngoalung are tributaries from the north. The valley is very sandy, partly forming
dunes 4 to 6m. high. Kugru and Gablung are the next tributaries from south and
north. The main valley is fairly narrow, and has some grass and bushes. At
Dambak-rong our Camp is at 4,657m. (15,275 feet). The following mountains and
valleys are seen from the place: to the S.15°E. the near peak Pema-lachung-maro;
S.30°W. the valley Gablung; S.35°W. Mount Shubuk; S.53°W. Mount Domboche;
S.69°W. Mount Langma-tebo; N.W. the valley of Gonchok; N.38°W. Mount Nemo-
chupgo, and behind it the valley of Gyago-tsang; N.15°W. Mount Langi-gabri; N.4°E.
the upper Gablung; N.35°E. the valley of Kamsang; N.43°E. a Mount Ngombo-yüpta;
N.50°E. the valley of Nilung-ringma; N.75°E. Mount Nima-lunguse.
The joint brook flows S.W. and west and our road follows it out from the
mountains of phyllitic schist and sandstone to the wide valley or steppe of Tsepo,
leading to Tradum. Danken is a little hill left to the south; the tasam follows the
southern side of the valley. Gabuk is a right tributary, and Tuto-pukpa a mountain
on the same side. The road continues westwards across very good pasture-grounds,
between pools, and touching a black sandstone rock from the northern side, with a
cairn full of flags and mani-stones; beyond it the valleys of Chingo-ongma and
Chingo-kongma come from the north. The last part of the road proceeds between
sand-dunes, more or less bound by vegetation; the road is sometimes like a river-
bed 12m. broad and 1 or 1¹/2m. deep in the sandy ground.
The height of Tradum is 4,591m. (15,058 feet). Tradum-gompa is built on a
little rock of quartzitic schist and sandstone. The view reaches far over the Tsangpo
valley to the south and the northern Himalaya range, the highest part of which is to
the S.5°E. and called Jatin; other high groups are Gapo-tonak and Mubo-garang to
the S.33°W. and S.44°W.; Gaum is a mountain to the S.75°W.; N.83°W. is a group
Kitse-rinak near the Tsangpo; to the N.67°W. is the mighty gate indicating the
valley of the Tsangpo; N.50°W. is Mount Dünjo; N.40°W. is the valley of Tsa-chu-
tsangpo; on this side of its mouth is an isolated rock, Tsukdor, on the plain; N.35°W.
is the valley of Javö; N.10°W. Mount Pobrang.
The distance from Tradum S.S.W. to the Tsangpo is 10,3 km. crossing a plain
with a fall of only 26m. The road passes several pools between sand-dunes bound
by vegetation. Only along the brook which we had first seen at Särchung-la, and
which is now called Davak-rong-chu, are there some small hills of schist; the brook
is about 25m. wide and very shallow. The place where it is crossed is called
Biu; here some dunes are even 8m. high and without vegetation; the steep lee-sides
look E.N.E.; accumulation of sand is characteristic to the open plains of the upper
Tsangpo valley. Sondongma and Na-karbup are broad tributaries from the east;
east of the road are low hills, one of them with a ruined fort on its top.