16. If then we judge aright of these matters, the opinion of the Ionians about Egypt is not sound: but if the judgment of the Ionians is right, I declare that neither the Hellenes nor the Ionians themselves know how to reckon since they say that the whole earth is made up of three divisions, Europe, Asia, and Libya: for they ought to count in addition to these the Delta of Egypt, since it belongs neither to Asia nor to Libya; for at least it cannot be the river Nile by this reckoning which divides Asia from Libya, 24 but the Nile is cleft at the point of this Delta so as to flow round it, and the result is that this land would come between Asia and Libya. 25 17. We dismiss then the opinion of the Ionians, and express a judgment of our own in this matter also, that Egypt is all that land which is inhabited by Egyptians, just as Kilikia is that which is inhabited by Kilikians and Assyria that which is inhabited by Assyrians, and we know of no boundary properly speaking between Asia and Libya except the borders of Egypt. If however we shall adopt the opinion which is commonly held by the Hellenes, we shall suppose that the whole of Egypt, beginning from the Cataract 26 and the city of Elephantine, is divided into two parts and that it thus partakes of both the names, since one side will thus belong to Libya and the other to Asia; for the Nile from the Cataract onwards flows to the sea cutting Egypt through the midst; and as far as the city of Kercasoros the Nile flows in one single stream, but from this city onwards it is parted into three ways; and one, which is called the Pelusian mouth, turns towards the East; the second of the ways goes towards the West, and this is called the Canobic mouth; but that one of the ways which is straight runs thus,—when the river in its course downwards comes to the point of the Delta, then it cuts the Delta through the midst and so issues out to the sea. In this we have 27 a portion of the water of the river which is not the smallest nor the least famous, and it is called the Sebennytic mouth. There are also two other mouths which part off from the Sebennytic and go to the sea, and these are called, one the Saïtic, the other the Mendesian mouth. The Bolbitinitic and Bucolic mouths, on the other hand, are not natural but made by digging.