It is unnecessary to enter into any details, respecting this geography, which is already before the public, in his excellent book of Travels, which furnishes an important part of the subject now before the reader; particularly what respects the head of the White River, (that is, the Nile;) and, by implication, what concerns the termination of the Niger also. In the selection of materials from the map made by Mr. Browne, from his own observations and inquiries, I have scrupulously adhered to the map itself, (except in the single instance of the position of the capital of Bornou;) on a supposition that he had well compared and weighed the authorities for the different reports of bearings and distances; and thence formed a better result than could be done by any other person. But I have added from his Appendix, some intermediate routes, and positions, which he judged proper to omit in his map. He informs us, that he determined by inquiries, that proved satisfactory, the distance of the Nile from Selimé; whence it appears, that although the position of the great cataract, as well as those of Moscho, and of Dongola, taken on the authority of Mr. Bruce, ought to come _somewhat_ more to the south or south-west; yet that, in a general point of view, the agreement is closer than could have been expected. The same may be said of Sennaar, in respect of Darfoor; Mr. Browne being satisfied, that the interval of distance between them, agreed to the observations; the one being determined by Mr. Bruce, the other by himself. Mr. D’Anville had placed Sennaar nearly four degrees of longitude too far to the west, in his map of Africa, 1749.[46] It may be observed, that between Egypt and Darfoor, no waters whatsoever communicate with the Nile, from the west: and that Mr. Browne was assured, that the same state of things existed to the south, between Darfoor and the head of the White River. So far indeed, from any water running to the east in that quarter, he was told (and the fact is corroborated in part by others,) that the waters to the west and south-west of Darfoor, all ran to the _west_ or _north-west_.