374 REM ARKS ON, &c. 
outlet in the Yeou and the central lake : this would be the 
branch seen by M. Caillie before he reached Timbuctoo, 
and which our traveller followed^ the other being on his 
right flowing east-south-east ; and there is no proof that 
the whole of the former rejoins the latter. The great lake 
Tchad^ or central sea, would then not be the general re- 
ceptacle of the Dhioliba, but only one of its outlets. 
