Strabo Geography 1.2.23

[23] Again, they are entirely wrong when they allege as a mark of Homer’s ignorance, that he describes the island of Pharos ¹ as entirely surrounded by the sea. On the contrary, it might be taken advantage of as a proof that our poet was not unacquainted with a single one of the points concerning Egypt which we have just been speaking of: and thus we demonstrate it:—Every one is prone to romance a little in narrating his travels, and Menelaus was no exception to the rule. He had been to Ethiopia, ² and there heard much discussion concerning the sources of the Nile, and the alluvium which it deposited, both along its course, and also at its mouths, and the large additions which it had thereby made to the main-land, so as fully to justify the remark of Herodotus ³ that the whole of Egypt was a gift from the river; or if not the whole, at all events that part of it below the Delta, called Lower Egypt. He had heard too that Pharos was entirely surrounded by sea, and therefore misrepresented it as entirely surrounded by the sea, although it had long ago ceased so to be. Now the author of all this was Homer, and we therefore infer that he was not ignorant concerning either the sources or the mouths of the Nile.