Note 1 — CHAP. I.

There is some reason to believe that the Latitude as here given, may have been transposed in transcribing, and thus the Latitude placed for the Longitude. But, having no access to any copy but one, I have not the means of ascertaining this point. If this transposition has taken place, then the Sagapola Mountains would be a continuation of the Usargala Mountains, and a chain extending on the south side of the desert, till it joined Mount Mandrus. On the other hand, as the river Subos, which enters the sea in 29° North Lat. is said by Ptolemy to flow from those mountains, it would fix them as being part of the grand chain of Mount Atlas.