128 Proceedings of the Royal Society 
flowing into Lake Liemba; a river-like prolongation unites Liemba 
and Tanganyika, these two appearing to be at the same level • then 
Tanganyika and Nyige Chowambe, which is evidently the Albert 
Nyanza, are one water, and that the last is a reservoir of the White 
Nile is undoubted. 
The union of the second presumptive head stream, the Cham- 
beze, with the Nile, is less apparent ; indeed, the balance of evi- 
dence seems to show that it must be the head of the other great 
river of Africa, the Congo. If the Chambeze prove to join the 
Nile, then the streams to the Lake Liemba become mere tributaries, 
since the course of the Chambeze is by far the longer of the two. 
The feeders of Liemba and the Chambeze rise, however, side by 
side, on the eastern plateau. The Chambeze flows down into the 
central valley through Lake Bangweolo, and then northward 
through Lake Moero. Livingstone describes Lake Moero as begin- 
ning 12 miles below the position of the town of Lunda, the capital 
of the Cazembe (lat. 8° 40' S., long. 28° 20' E.), whose position 
may be laid down with tolerable accuracy from the former journeys 
of the Portuguese travellers. Since Livingstone proceeded north 
from Cazembe’s town, along the eastern shore of Moero, in his 
attempt to reach Ujiji in 1867, the great bulk of this lake must lie 
to the westward of the meridian of Lunda, or about 120 miles to 
westward of Tanganyika. Dr Livingstone has seen the river at its 
outflow from the lake, and also at the point where it emerged 
from the crack in the mountains of Bua, when, according to his 
own observation, the river turned to north-north-west to form 
Ulenge, a third lake or marsh in the country west of Tanganyika. 
This north-westerly turn would carry the river quite out of the 
direction of the Nile basin, and the higher side of the continent 
being to the east, the probability is, that the river continues to 
curve to the west. 
Again, the valley of the Chambeze, in the plateau where Living- 
stone crossed it, is, no doubt, one of the greatest hollows in the 
high land, so that the height of the river bed here may be 
taken at 3000 feet, the lowest level of the limits which Living- 
stone gives to the undulation of the plateau, or only 200 feet 
above the level of Tanganyika. Descending into the great 
valley to Lake Bangweolo from the plateau, the Chambeze must 
