We leave the Ionians' opinion aside, and our own judgment about the matter is this: Egypt is all that country which is inhabited by Egyptians, just as Cilicia and Assyria are the countries inhabited by Cilicians and Assyrians, and we know of no boundary line (rightly so called) below Asia and Libya except the borders of the Egyptians. But if we follow the belief of the Greeks, we shall consider all Egypt commencing from the Cataracts and the city of Elephantine to be divided into two parts, and to claim both the names, the one a part of Libya and the other of Asia . For the Nile , beginning from the Cataracts, divides Egypt into two parts as it flows to the sea. Now, as far as the city Cercasorus the Nile flows in one channel, but after that it parts into three. One of these, which is called the Pelusian mouth, flows east; the second flows west, and is called the Canobic mouth. But the direct channel of the Nile , when the river in its downward course reaches the apex of the Delta, flows thereafter clean through the middle of the Delta into the sea; in this is seen the greatest and most famous part of its waters, and it is called the Sebennytic mouth. There are also two channels which separate themselves from the Sebennytic and so flow into the sea: by name, the Saïtic and the Mendesian. The Bolbitine and Bucolic mouths are not natural but excavated channels.