Nyanza, would appear to bo the true "Nile of the Moon," at least in the length of its course. But if the barometric altitudes taken by Pearson can be trusted, this stream cannot possibly reach the lacustrine basin, for it flows at a lower level. On the other hand, it cannot trend westwards in the direction of Lake Tanganyka, from which it is separated by ridges some 500 feet high.[1] Hence it probably runs out in some landlocked basin.
Speke was infonned by the natives that this region, comprised between the great lake and the lofty coast ranges, is studded with lakes and salines, like those heard of by Denhardt, Erhard, and Wakefield as lying further north. Till recently copious streams might still be supposed to flow from the western slope of Kilima-Njaro, the giant of African mountains, whose two snowy peaks rise some 240 miles to the east of Nyanza. But the waters escaping from the gorges of this volcano flow mainly east and south to the Indian Ocean, while the rivulets descending from its west side lose themselves in the depressions of the plateau. None of the watercourses observed by Stanley and other travellers on the east side of Nyanza are of considerable size, and all of them rise at some distance from Kilima-Njaro.
The water-parting between the Indian Ocean and the Nile is lower than the eastern ranges, and has rather the appearance of an elevated cliff terminating abruptly eastwards, and sloping gently towards the west. Above it at intervals rise volcanic cones, and the statement of the Arabs, that several of them still show signs of activity, has been recently confirmed by the evidence of the traveller Fischer. Erruptions are even said to occur, and two of the cones take the name of Dunyé-M'buro, or "Smoky Mountain." Another is known as the Dunyé-Ngai, or "Heavenly Mountain," and copious thermal streams flow from the fissures. The foot of the eastern escarpments, some 4,320 feet high, is skirted by a thennal lake, which is continued by swampy tracts where soda is deposited. In this district the chain of volcanoes is separated by a deep depression from Kilima-Njaro, and the lake itself is little over 2,000 feet above sea-level.
Of all the affluents of Lake Nyanza, the Kagera (Tanguré or river of Kitangulé), which joins it from the west, has the best claim to be considered as the main head-stream of the basin, at least so far as regards its volume. This river, which by its first explorers was named the Alexandra Nile, rises in a highland region some 60 miles south of the equator, and nearly 2,340 miles in a straight line from the Mediterranean. After collecting the torrents from Mount Mfumbiro it takes a normal north-easterly course towards Nyanza. Stanley penetrated into the valley of this Upper Nile below its confluence with the emissary of Lake Akanyaru, which had also received the name of Lake Alexandra even before it had been actually visited by any European. In the district explored by Stanley the Kagera traverses several lakes and receives the overflow from other lacustrine basins, flooding the surrounding depressions. It has a mean depth of fifty feet, and the horizon is completely shut out by the tall masses of papyrus fringing its banks. Speke and Grant, who were the first to visit this Upper Nile, crossed it much lower down, below the Morongo Fall, one or two days' march from its confluence with Nyanza.
- ↑ E. G. Ravenstein, "Map of Eastern Equatorial Africa."
8—AF.
