_Sennaar_, as well as the course of the Nile, the coast of the Arabian gulf, _Masouah_, _Gondar_, _Swakem_, &c. have the same position as in M. Rennell’s map. _Sennaar_ is in longitude 33° 30′ 30″. _Cobbé_ being in 28° 8′, the difference between them will be 5° 2′ 30″—_Rîl_ cannot be more than twelve or thirteen miles E. of _Cobbé_, but _Rîl_ is only twenty-three days journey from _Sennaar_. There remain therefore on a direct line 4° 50′ which is about twelve and a half geometrical miles _per_ day; and admitting the smallest possible deviation, will give fourteen miles by the road. This on so long a journey is much more than might be expected, and by no means accords with the route to _Bornou_, which allows only about nine miles for each day’s march.—D’Anville’s position of _Sennaar_ (29° 39′) would bring it too near to _Rîl_, leaving only eighty miles between them, or three miles and quarter _per_ day. Whether the truth lie between the observation of Mr. Bruce and the conjecture of D’Anville, or whether the former be well established, and the length of each day’s march may be accounted for from the straitness and facility of the road, some future occasion must determine. One circumstance would seem clear, viz. the distance between the _city Sennaar_, and the _Bahr-el-abiad_, which the repeated and unvaried testimonies of the natives relatively to the interval of three, or three and half days, leave no room to doubt, have hitherto been placed much too far apart. The road from _Wara_ to _Dar Kulla_ exhibits a remarkable coincidence as to the number of rivers and lakes which it passes, with that part of Major Rennell’s last general map of Northern Africa, which forms what he considers as the alluvies of that portion of the continent, though it be neither in the same latitude nor longitude. Of these various streams little description was obtained. The country they flow through is said to be great part of the year wet and marshy; the heat is excessive, and the people remark that there is no winter. The course of the rivers, if rightly given, is for the most part from E. to W. The river called _Bahr Misselad_ is said to be a considerable one. It’s source is not described, but appears to be not far distant from the supposed site of the copper mines. Those who frequent this road, ordinarily pass two years from the time of leaving _Wara_ till their return to that place, or _Cobbé_. Of the time actually employed in the route they differ in their report, but it may be estimated at from 150 to 180 days; at a medium 165. _Wangara_ I have never heard mentioned. Whether it may be the same country with some one of those described is uncertain; but its production being gold, does not accord with any of them; that commodity not being, as far as was related to me, found in any quantity to the W. _Zamphara_ is yet known to several of my informers, as a country near to _Bornou_; but no particular description was given.