For it is not in Greece alone that the crane is observed to emigrate to more southern regions, but likewise from Italy and Iberia,[206] from [the shores of] the Caspian, and from Bactriana. But since the ocean extends along the whole southern coast, and the cranes fly to all parts of it indiscriminately at the approach of winter, we must likewise believe that the Pygmies[207] were equally considered to inhabit the whole of it. And if the moderns have confined the term of Ethiopians to those only who dwell near to Egypt, and have also restricted the Pygmies in like manner, this must not be allowed to interfere with the meaning of the ancients. We do not speak of all the people who fought against Troy as merely Achæans and Argives, though Homer describes the whole under those two names. Similar to this is my remark concerning the separation of the Ethiopians into two divisions, that under that designation we should understand the whole of the nations inhabiting the sea-board from east to west. The Ethiopians taken in this sense are naturally separated into two parts by the Arabian Gulf, which occupies a considerable portion of a meridian circle,[208] and resembles a river, being in length nearly 15,000 stadia,[209] and in breadth not above 1000 at the widest point. In addition to the length, the recess of the Gulf is distant from the sea at Pelusium only three or four days’ journey across the isthmus. On this account those who are most felicitous in their division of Asia and Africa, prefer the Gulf[210] as a better boundary line for the two continents than the Nile, since it extends almost entirely from sea to sea, whereas the Nile is so remote from the ocean that it does not by any means divide the whole of Asia from Africa. On this account I believe it was the Gulf which the poet looked upon as dividing into two portions the whole southern regions of the inhabited earth. Is it possible, then, that he was unacquainted with the isthmus which separates this Gulf from the Egyptian Sea?[211]