290 REMARKS ON T R x\V E L S 
not know whether it passes to el-Fez, where however 
several different rivulets are seen. 
Neither was the journey across the Sahara altogether 
unprofitable with regard to our knowledge of the oases 
and of the stations which it contains. The distances of 
these places from the several points of his route were 
reported to our traveller ; and these distances are very 
different from those previously admitted : but are there 
two accordant testimonies concerning these positions ? 
Each caravan and each tribe makes a different estimate 
of the intervals ; and if, to the actual mistakes which the 
Moors and natives may commit, the errors in which they 
are interested be added, what a source of uncertainty 
will these present ! Therefore, though I have fixed 
upon the general map the points of Tychyt, Oualet, 
Ouadan or Hoden, Ouad-Noun, &c., according to the 
indications of M. Caillie, combined with other docu- 
ments, I consider them as very uncertain. Oualet, says 
our traveller is at ten days' distance from el-Araouan, to the 
west, fifteen north from Sego, and eighteen from Ouadan : 
this point falls near nineteen degrees of latitude and 
nine degrees forty minutes longitude west from Paris ; 
the three lines meeting at nearly the same point. But 
if it agrees with the three data given above, it is at 
variance with the situation of Oualet, as hitherto admitted, 
either from Mungo Park, or the testimony of the natives. 
It is perhaps another place named Oualet, not that in- 
tended by Mungo Park. Can it be the Gualata of Leo 
