Bornou, is given by the Shereef, at about fifty days from Mourzouk (or Fezzan) which may be taken at six hundred and fifty miles. He also reports that it is twenty-five days journey from the course of the Nile, where it passes the country of Sennar; or in distance about three hundred and sixty miles. This would place Bornou in a direction of South East, somewhat southwardly, from Mourzouk; and about the parallel of 19° 40′. It is not probable that Bornou has a more westerly position. Edrisi’s account would place it more easterly; for he says, that _Matthan_, a city of _Kanem_, lies thirty-one days from _Nuabia_ (on the Nile) through _Tegua_. _Geog. Nub._ p. 15. Edrisi’s day’s journey is equal to eighteen Arabic miles, or nearly nineteen geographic ones: consequently the thirty-one days give five hundred and eighty-seven miles. Matthan is not reported in the Itinerary; but Kanem is, both as Province and a capital City: and the position of the latter according to my construction, is seven hundred miles from Nuabia. Whether the error lies on the side of Edrisi, or the Shereef; or arises from the faulty position of Nuabia in D’Anville, cannot easily be discovered. Ben Alli travelled the road between Bornou and Alexandria; but was too much indisposed to make any observations, otherwise than that the Kingdom of Bornou extends fifteen days journey, or about two hundred and thirty miles, in that direction. This was particularly unfortunate; for whichsoever route he went, he must have crossed some one or more of the OASES; and of course some important matter would have been added to the Map. The only route of importance that remains to be discussed, is that from Fezzan or Mourzouk, to Cairo, leading to Mecca; for, at Mourzouk the Mahomedans from the southern and western parts of Africa, who intend to make a pilgrimage to Mecca, assemble at the proper season, as at a common point of departure. The route to Cairo, which requires fifty-three days to atchieve, appears on the Map to be seven hundred and seventy miles; being equal to fourteen and half for each day: and is on the whole, seventy more than I should have expected that number of days to produce. To what degree of accuracy the difference of longitude between Mesurata and Cairo, is ascertained, I am ignorant: as also whether the bearing of Mourzouk from Mesurata, be right. Fourteen miles and half of horizontal distance for each day, on so long a line of distance, and on so rugged a way as the Itinerary describes, is too great a proportion; and we may suspect an error somewhere.