ANALYSIS OF THE MAPS 
ther into the desert ; and when he removes his camp the 
entire population travels with him. The extent of space 
subject to this powerful tribe has been hitherto known only 
from east to west ; but we learn from this account how 
far it reaches towards the north. 
It would be desirable to geographers to learn the pre- 
cise position of lake Aleg, that of the mountain called 
Zire (a word which however is a generic term), and the 
limits of the great tribe of the Abou-sebas or el-Abou- 
sebah, the name of which is very differently and incor- 
rectly written upon the recent maps : those who have sup- 
posed that the article formed part of the word, and that 
the termination might be retrenched have made out of it 
the word labos. Two terminations have been used sehas 
and sehah ; the last only is correct. 
I shall confine myself to a remark upon the relative 
position of Adar and the lake Aleg. According to our 
traveller, the distance from the one to the other is seven 
days' journey : how then shall we reconcile the situation 
assigned to Adrar, not far from Ouad-noun, which is more 
than thirty days distant from the territory usually at- 
tributed to the Braknas ? It would be requisite that this 
territory should extend northwards even to the extremity 
of the Sahara, which is contrary to our received ideas, but 
perhaps not to the fact. 
M. CaiUie, having returned in May 1824 to St. Louis, 
and despairing to obtain the means necessary for accom- 
plishing his purposes, determined to remove to Albreda 
on the Gambia, and thence to Sierra- Leone, where he 
succeeded in collecting some resources, by availing him- 
