THE NILE-CONGO WATERSHED 189 



by the solid base of the latter mountain into two 

 streams, of which one had flowed north to the 

 Albert Edward Nyanza and the other south towards 

 Lake Kivu. The southern lava-flow is smoother 

 and less broken up by secondary eruptions than is 

 the other, and we walked down it for many miles 

 towards the lake. It sloped gently downwards ; it 

 was undulating and full of crevasses, and except 

 that it was black and exceedingly hot, we could 

 have imagined ourselves on a huge dry glacier. 

 To the west the long forest-covered slopes of Tsha- 

 nina-gongo fell away toward the north-west corner 

 of Lake Kivu, and to the east was a more irregular 

 country broken up by innumerable little conical 

 hills, extinct volcanoes, all cultivated from bottom 

 to top, and beyond that the higher hills of Ruanda. 



At the end of a long day's descent we came 

 suddenly within sight of the blue-green waters of 

 Lake Kivu, with its thousand crinkled bays and 

 islands and steep mountainous shores, and on the 

 following day, after walking through miles of banana 

 and maize plantations, we found ourselves at the 

 water's edge in a beautiful little almost land-locked 

 cove, which would not have seemed strange in the 

 English lakes. 



