DISCREPANCIES BETWEEN MY TWO MAPS OF BOGTSANG -TSANGPO. '37
have, therefore, . to cross some steep passes. In the valleys here and there nomads are living, and there are a few monasteries, the lamas of which get their food gratuitously from the nomads. At Oiizbo there is only one house with 3o or 4o inhabitants. They are very poor, and their sheep and yaks are brought to Bog-tsang-/sang-j5o for the winter. From the lake there is no direct road to Shiga/se, only a roundabout way 3o days with yaks, 15 with ponies. The surroundings of Dangray11d11-tso were usually described as very poor and inhospitable, though the unfavourable descriptions may have been given to discourage us from visiting the sacred lake.
At Camp LXXXII Pan. 94A and 94B, Tab. 15, was sketched. The valley of the Bog /sang--/sang-f>o is the most bewildering and inextricable part of Tibet I have visited. It is not simply one great regular latitudinal valley with mountains to the north and to the south and the meandering river between them, which would be very simple and easy to recognize. It is a system of small parallel mountain ridges and ranges principally running east and west. Very often, especially in the region between Camps LXXXII and LXXXV, they have no visible connection with one another. In other cases they are pierced by the river in narrow gorges. In still other cases the river seems to flow in a semi-circle around one such little mountain group. Such instances are to be found on my Pl. 67 in Vol. II of the Atlas of my Scientific Results of a Tourney in Central Asia. Now, when returning to the Bogg/sang-/sangpo a second time, several discrepancies were found between the two maps. A comparison between the two routes shows that I have not followed exactly the same way in both cases. Therefore the two maps do not agree, and the differences between them are in some cases rather great. In 190 I I also travelled partly north of the river and, on its southern side, to the south of small mountain-groups and hills, which I, in 1906, left to the south and saw from their other side. This fact changes the landscape and perspective completely. At two or three points where I have camped both times on the southern bank of the river, Colonel Byström, by constructing the general map in 1: I 000 000 has been able to check the coincidence of the two routes. Between my Camps LXXXII and LXXXV of 1906, is a distance of 2 6.5 km. Between my Camps XCIII and XCIV of 190 I the distance is 30.0 km. Now these camps cannot, of course, be at the very same places, but
approximately they are so. In both cases the river makes a large bend to the north and disappears from sight. It is not easy either to see where the river turns to the north and where it comes back to my route. Mistakes can easily be made. There are frozen branches of the river which during the winter have been cut off; and at other places the principal branch of the river may be hidden by its own fluvial terraces. The river is thus meandering in a most irregular way between this labyrinth of isolated rocks and hills. Thus the great northern bend spoken of before goes around several groups of hills. As my route of 190I goes farther south,
is. IV.
IIIFカラー高解像度
