[Footnote 70: It appears in page 176, (_note_) that Burgu is 18 journies from Tibesty; which, at 14 G. miles each, (as they are of 18 B. miles by the road,) produce 252 miles. Burgu is said, page 119, to be situated to the south, _some days_ distant from Febabo. On the construction the line of 252 miles passes to the eastward of Febabo, (placed at 10 days to SSW from Augila, see page 108,) _so far_, as to place Burgu to the _south-eastward_, instead of _south_, from Febabo. It may be, that Febabo does not bear so far to the west, as SSW from Augila; as less than 14 miles per day cannot well be allowed, from Tibesty. I have therefore altered the bearing from SSW, and made it somewhat nearer to the meridian. The Berdoa, or Bardeo of Leo, (pages 245, 246,) agrees to this position, 500 Arabic miles from the Nile, in the midst of the Desert of Libya; and abounding with dates.] [Footnote 71: Notwithstanding the appearance of retributive justice in these attacks on the Tibbo, by the Sultan of Fezzan, yet Mr. Horneman lets us a little into the secret, by informing us, (page 68,) that “for some years past, the Sultan has augmented his revenues considerably, by _cursory expeditions_ against the Tibbos of Burgu.” And the result of the above expedition was, “the _stealing_ of about two hundred people, which were sold,” &c. It may be remarked, that Mr. Browne says of the Sultan of Darfoor, that a part of his revenue arises from a participation in the profits of the _selatia_, or _slave-hunting_ parties, (page 299.) And of the Negro country of _Dar Kulla_, he says, that even the public regulations are framed with a view to the _entrapping_ of individuals for slaves. (308.) So that the slave trade exists much in the same manner, in this quarter of Africa, where none of the slaves are purchased by European traders, as in the west.] [Footnote 72: It has appeared that the caravan travellers in stating the time between distant places, are apt to give the whole time that elapses between their leaving one place, and arriving at another. Hence the days of halt, have often been added to the days of march; and a faulty route of travelling has thence been adopted. This, no doubt, occasioned the low rate adopted, soon after the institution of the Association: and which nothing but actual experiment can effectually correct.] [Footnote 73: The proof of this fact is most satisfactorily established, by Herodotus, and by Ibn Haukel, a geographical writer of the tenth century, whose work has been lately translated by Sir William Ouseley; to whose labours the science of Geography is much indebted.] [Footnote 74: Mr. Horneman regards this nation as the _Terga_ of Leo, situated in the western quarter of the Great Desert. (Leo, page 245.)] [Footnote 75: Ptolemy has a city named _Tagama_, at the Niger, but too far to the east, to answer to the position here given. (Afr. Tab. IV.). There is also a _Tegoma_ in our geography, near Kashna.]