The position of _Assiût_ is fixed, both in latitude and longitude, by observation. That of _Charjé_ in latitude by observation; in longitude, as above described. While at _Sheb_, the Writer had an opportunity of observing his position at leisure, both in latitude and longitude. At _Selimé_ he enjoyed the same satisfaction. The mountains, to the East of the road, are laid down according to their appearance to the eye of the observer from the villages of _Elwah_, and the route of the caravan beyond them. Their S.E. extremity, as here marked, rests solely on the report of a native of _Mahas_. The distance from _Selimé_ to the river, has been judged fully established by the uniform and unvarying testimony of a number of Jelabs of _Dongola_, &c. who travel that route. The latitude of _Leghéa_ was variously observed, both in going and returning. Its longitude is only determined by the bearing of the road, relatively to _Bîr-el-Malha_ S. and _Selimé_ N. Several days consumed at _Bîr-el-Malha_, afforded the means of determining its position both in latitude and longitude. _Sweini_ and _Zeghawa_ have been placed only according to the bearing and distance computed from _Cobbé_ and _Le Haimer_. But the two latter places are fixed without much doubt by frequent lunar observations, the occultations of Jupiter’s satellites, &c. With regard to _Cubcabéa_ and _Rîl_, no more could be done than to place them according to the uniform and constant report of the natives. They are both places much frequented, and in so small a distance no mistake of importance can have arisen. The bearings of the road from _Cubcabéa_ to _Wara_, and thence to the capital of _Bornou_, are not laid down but from numerous inquiries, and some labour employed in adjusting them. That road occupies sixty days. The position of the capital of Bornou varies from that which is allotted to it in the latest maps, but scrupulously adheres to the bearings and distance given. _Abu-Shareb_ is from _Cobbé_ nearly W. by N. _Abu-Shareb_ to _Wara_, N.W. by N. From _Wara_ to the capital of _Baghermi_, between W.N.W. and N.W. by W. Road winding S. From _Baghermi_ to _Kottocomb_, N. by W. 2 W. From _Kottocomb_ to _Bornou_ nearly in the same direction.