Book 17
1.3
Before the times of Petronius there was the greatest plenty, and the rise of the river was the greatest when it rose to the height of fourteen cubits; but when it rose to eight only, a famine ensued. During the government of Petronius, however, when the Nile rose twelve cubits only, there was a most abundant crop; and once when it mounted to eight only, no famine followed. Such then is the nature of this provision for the physical state of the country. We shall now proceed to the next particulars.
1.4
The Nile, when it leaves the boundaries of Ethiopia, flows in a straight line towards the north, to the tract called the Delta, then cloven at the head, (according to the expression of Plato,) makes this point the vertex, as it were, of a triangle, the sides of which are formed by the streams, which separate on each side, and extend to the sea, one on the right hand to Pelusium, the other on the left to Canobus and the neighbouring Heracleium, as it is called ; the base is the coast lying between Pelusium and the Heracleium.
1.4
An island was therefore formed by the sea and by both streams of the river, which is called Delta from the resemblance of its shape to the letter (δ) of that name. The spot at the vertex of the triangle has the same appellation, because it is the beginning of the above-mentioned triangular figure. The village, also, situated upon it is called Delta.
