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

AT THE SOUTHERN SIDE OF THE TSANGPO.

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west the low hills. The high regions of the mountains were still hidden in clouds, and only one peak could be seen to the west. Many mani walls are built along this road, more specially at Sati-keri. A series of small valleys all dry open from the west; only Piju is comparatively large; it has a road over Piju-la to Narung. Entering a little valley with a diabas rock, Chasang, in its middle, and otherwise sandstone at its sides, we ascend slowly to Chasang-la. The gravel is fire-stone and sandstone. On its northern side a valley called Bando goes down. Camp 184, west of a little lake, Tso-tot-karpo, is at a height of 4,594m. (15,068 feet).

Along the foot of the hills the road continues N.W.; to the N.E. is the great plain of the Tsangpo. Shapche is a tributary from the west, the mouth of which we cross; the living rock is glauconitic sandstone and graywacke sandstone. Gakum and Chikum are left tributaries, the first with a brook. To the N.E. is a promontory, Tebo-lugmik. Yakchen-la is a little pass to the east of our road. Higher up in the main valley the rock is breccia and graywacke sandstone. Camp 185 is at

4,796m. (15,731 feet).

The ascent to the pass Tagu-la, 5,026m. (16,485 feet), is steep; the view is much hidden by surrounding mountains. Only parts of the ranges north of the Tsangpo can be seen, as, for instance, some snowy peaks to the N.8°W. Quite near us to the N.32°E. is the group, Kirtse-rinak, and N.55°E. Pompo-nagur; to the N.78°E. a part of the Lunpo-gangri appears over the saddle of Yakchen-la. In the distant S.E. snow-covered mountains raise their heads; three snowy peaks, by the guide called Di, Tanja, and Yara, are seen to the S.28°E. To the S.S.E. are the heights of Gakumdumboche, S. I °E. is the peak Mubo-gärang, and S.S.W. Chikum. On the pass the rock is graywacke sandstone, and west of it tight quartzitic mass.

West of the pass the road follows the Tambap valley, open and broad. Quite a new panorama now opens up to the west, with a mighty part of the Himalaya called Mogum-gangri. The rock is tight quartzitic mass. From the south enters a tributary Pipu, from the west Ngyunglung. The great plains of the Tsangpo appear again with the meandering river in the middle, looking blue in the distance. The general flatness of the country is surprising, and no high mountains are within sight. Camp 186, Tambap, is at 4,785m. (15,695 feet). The rock is sandstone.

The next march takes us farther down the Tambap valley W.N.W., and out on open desolate ground; the bed of the Tambap is broad and shallow without terraces. North of the road is a series of low hills. From the S.W. enters a great valley Tovö-latsa from Tsen-la with a road to an uninhabited region called Kala.

Our road approaches the hills to the right, consisting of tight quartzitic mass and diabas or basalt; a part of these hills is called Denjung; the specimens of rocks to our left are the same as just mentioned, and limestone.

The road then follows down to the N.W. the valley Närung-tsangpo, containing very little water, most of it in isolated pools in the bed. The valleys Churu and Lungpa-tokpa enter from the left. Takdong is a valley, the mouth of which is seen

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