IN CENTRAL AFRICA. 269 
and its mountains are the source of the Dhioliba on the 
one side, and the Rokelle and the Mungo take their rise 
on the other. From the backs of the mountains of the 
Fouta-Dhialon spring the tributaries of the Dhioliba, as 
the Tankisso (which cannot be an arm of the Senegal, as 
M. Caillie was informed) : the spot where it rises is 
not far from Timbo, and the true point of division 
between the basons of the north and the east. Thus we 
have a proximate acquaintance with the relief of the country, 
which presents a satisfactory whole, where all appears to 
bear a natural connection. To this result M. Caillie's 
observations have materially contributed. 
Besides the line of division of which I have just 
spoken, there is another which separates the waters of 
the Senegambia from those of the Timannie ; it is the 
result of an attentive examination of M. Caillie's route. 
He crossed in fact two considerable rivers : the one, the 
Kakiriman, which is from seventy to eighty paces in 
breadth ; the other, the Cocoulo, which is forty-five ; and 
both very rapid. He saw them flowing to his right, that 
is southward, towards the bason of the Timannie.* 
Further on, that is after Popoco, all the rivers which he 
crossed flow to the left, towards the north, and into the 
Senegambia. Thus, between the route of M. Mollien and 
* All the rivulets near Kakondy nevertheless flow to the north 
into the Rio-Nunez ; but their course is short ; perhaps also, some of 
the succeeding ones fall into the Rio -Grande. 
