THE TANGANYIKA PROBLEM. 
93 
manner, succeeded in forcing its way out, and cut a channel 
for its overflow to the west into the Congo. 
This view of the matter will at once explain the fact that 
Tanganyika has otherwise unaccountably fallen some 40, 
possibly a. great many more, feet within no great number of 
years, the overplus ol water in it having worn away the 
The steep West Coast of the Albert Edward Nyanza. The Western side of the Great 
Central eurycolpic fold. 
channel to the west to such an extent that it will never 
regain its ancient high level. 
The portion of the great central eurycolpic fold which ex- 
tends beyond the Mfumbiro mountains, and contains the 
Albert Edward Nyanza, is similar in character to the more 
southern portion of the same great valley which contains 
Lake Tanganyika, until we reach the northern shores of 
the Albert Edward Lake. Here, however, a new feature 
