The Promontory of Kanem may be considered as the western extremity of the Greater Syrtis (say the Cephalas Promontorium in the neighbourhood of Mesurata); and a distance of one hundred and eight geographical miles from Mesurata would bring us within five miles of Zaffran, that is, five miles to the west of it; for Zaffran is one hundred and thirteen miles from Mesurata. According to this measurement, we should be induced to place Asna at Zaffran, in the absence of any ruins, as we have stated above, between that place and Mahad Hassan[3]. The town of Asna is laid down by Edrisi at forty-six Arabic miles from the city of Sort; and this distance added to the hundred and eight above stated would bring us to the neighbourhood of Medinet Sultàn, which is one hundred and fifty-one geographic miles from Mesurata. If we suppose, with Major Rennell, that forty-six has here been substituted for twenty-six, the latter measurement would bring us to Shuaisha, where there are certainly, as we have already stated, some inconsiderable remains, but not apparently those of a town. About two miles south-east of Medinet Sultàn are decided remains, of an ancient town, called Medina[4], (the city) which from the circumstance we are about to mention, we should be inclined to suggest as the most eligible position (at least in our opinion) for the city of Sort. The distance of Asna from the western point of the Syrtis, as given by Abulfeda, is found to correspond sufficiently well with that of Zaffran from Mesurata. Sort is stated to be situated to the eastward of Asna, at a distance of forty-six Roman miles from that place, according to the testimony of Edrisi; and the distance of Zaffran from Medina (forty-seven M. P.) corresponds very well with this statement, the latter place being, at the same time, to the eastward of the former. We may add that the term Sort, or Sert, is not known at the present day to the Arabs as applied to any city or town; but is merely used to designate the tract of country which lies between Sooleb and Barca. The ruins of Medina are situated within this territory; and supposing them to be actually the remains of Sort, we may imagine that when this city lost its former name, it continued to be distinguished as _the_ city, (the Medina) of the district to which its name of Sort had been transferred[5]. This arrangement will place the city of Sort at least forty miles to the eastward of its position according to the measurements above stated from Edrisi: but a short distance in reckoning is always preferable to a long one, and we should on that account prefer taking the distance of Sort from Asna to reckoning it from Tripoly as above. For the same reason the measurement of Abulfeda, from the Promontory of Kanem to Asna, is more likely to be correct than that of Edrisi from Tripoly to the city of Sort.