This account of the lake is strengthened by several circumstances. Horneman says, that the district of Fiddri, although so named by its own inhabitants, is called _Cougu_, or _Cugu_, by the people who dwell eastward; (the Arabs;) _Luffe_, by those on the west. Now, _Couga_, or _Kauga_, is noted by Edrisi, as a country and city near a large lake of fresh water, situated at 30 journies westward, or south-westward, from Dongola; 36 eastward from Gana: and here we have the very position. Moreover, Mr. Browne describes, in the before-mentioned western route, at 3½ journies short of the Bahr Fittré, _Dar Cooka_,[54] doubtless the country of _Couga_ or _Cugu_ in question. The circumstance of boats plying on the Bahr Fittré (Browne’s Travels, p. 465,) also accords with the idea of a lake. Nor can there be a doubt that the Misselâd of Browne, is the river from the quarter of Darfoor, intended by Horneman: and that _it_, as well as the river of Batta, falls into the lake of Fittré.[55] It may be remarked, that what Edrisi describes as the upper part of the course of the _Niger_, (_Nilus Nigrorum_) is evidently intended for this river: but he describes it as originating from the same source as the _Egyptian Nile_, and flowing westward. There also appears in Ptolemy, the same river springing from about the 10th degree of north latitude; as the Misselâd does. It appears certain then, that the ground declines, from the quarter of Darfoor, towards the interior of Africa, to the north-west and west: and the descriptions of Edrisi, (page 13,) go equally to prove that the ground also declines from the NE to SW, towards the lake of Fittré; because he describes the river of _Kuku_ to run southward.[56] The same must be understood of the river of the Antelopes, or _Wad-el-Gazel_, which is marked by Mr. Browne, (p. 465,) at two journies to the NW of the lake Fittré; and by Mr. Beaufoy at the distance of one journey from the capital of Bournu. Mr. Horneman indeed was told, that the Wad-el-Gazel was not a river, but a fruitful and well inhabited valley. It is probably both: that is, a fertile valley, with a river running through it. Hence we must suppose the Wad-el-Gazel to be another river that falls into the lake Fittré, from the north; and consequently, the lake itself, to be the receptacle of the eastern waters of the interior of North Africa. Edrisi places Semegonda at ten journies to the westward or SW of _Kauga_, (our _Fittré_,) and within the country of Wangara, which is entirely surrounded by the branches of the Niger, and periodically inundated by its waters: and it is clear that he believed, that there was a water communication between Wangara and Kauga; because he says, (p. 7.) that salt was conveyed all along the Niger, eastward to that point. It may be remarked, that Horneman says, that the people of Fittré (Kauga) have no salt, but what they obtain from vegetable substances.[57]