Of this land then, concerning which I have spoken, it seemed to myself also, according as the priests said, that the greater part had been won as an addition by the Egyptians; for it was evident to me that the space between the aforesaid mountain-ranges, which lie above the city of Memphis, once was a gulf of the sea, like the regions about Ilion and Teuthrania and Ephesos and the plain of the Maiander, if it be permitted to compare small things with great; and small these are in comparison, for of the rivers which heaped up the soil in those regions none is worthy to be compared in volume with a single one of the mouths of the Nile, which has five mouths. Moreover there are other rivers also, not in size at all equal to the Nile, which have performed great feats; of which I can mention the names of several, and especially the Acheloos, which flowing through Acarnania and so issuing out into the sea has already made half of the Echinades from islands into mainland. Now there is in the land of Arabia, not far from Egypt, a gulf of the sea running in from that which is called the Erythraian Sea, very long and narrow, as I am about to tell. With respect to the length of the voyage along it, one who set out from the innermost point to sail out through it into the open sea, would spend forty days upon the voyage, using oars; and with respect to breadth, where the gulf is broadest it is half a day's sail across: and there is in it an ebb and flow of tide every day. Just such another gulf I suppose that Egypt was, and that the one ran in towards Ethiopia from the Northern Sea, and the other, the Arabian, of which I am about to speak, tended from the South towards Syria, the gulfs boring in so as almost to meet at their extreme points, and passing by one another with but a small space left between. If then the stream of the Nile should turn aside into this Arabian gulf, what would hinder that gulf from being filled up with silt as the river continued to flow, at all events within a period of twenty thousand years? indeed for my part I am of the opinion that it would be filled up even within ten thousand years. How, then, in all the time that has elapsed before I came into being should not a gulf be filled up even of much greater size than this by a river so great and so active? As regards Egypt then, I both believe those who say that things are so, and for myself also I am strongly of opinion that they are so; because I have observed that Egypt runs out into the sea further than the adjoining land, and that shells are found upon the mountains of it, and an efflorescence of salt forms upon the surface, so that even the pyramids are being eaten away by it, and moreover that of all the mountains of Egypt, the range which lies above Memphis is the only one which has sand: besides which I notice that Egypt resembles neither the land of Arabia, which borders upon it, nor Libya, nor yet Syria (for they are Syrians who dwell in the parts of Arabia lying along the sea), but that it has soil which is black and easily breaks up, seeing that it is in truth mud and silt brought down from Ethiopia by the river: but the soil of Libya, we know, is reddish in colour and rather sandy, while that of Arabia and Syria is somewhat clayey and rocky. The priests also gave me a strong proof concerning this land as follows, namely that in the reign of king Moiris, whenever the river reached a height of at least eight cubits it watered Egypt below Memphis; and not yet nine hundred years had gone by since the death of Moiris, when I heard these things from the priests: now however, unless the river rises to sixteen cubits, or fifteen at the least, it does not go over the land. I think too that those Egyptians who dwell below the lake of Moiris and especially in that region which is called the Delta, if that land continues to grow in height according to this proportion and to increase similarly in extent, will suffer for all remaining time, from the Nile not overflowing their land, that same thing which they themselves said that the Hellenes would at some time suffer: for hearing that the whole land of the Hellenes has rain and is not watered by rivers as theirs is, they said that the Hellenes would at some time be disappointed of a great hope and would suffer the ills of famine. This saying means that if the god shall not send them rain, but shall allow drought to prevail for a long time, the Hellenes will be destroyed by hunger; for they have in fact no other supply of water to save them except from Zeus alone. This has been rightly said by the Egyptians with reference to the Hellenes: but now let me tell how matters are with the Egyptians themselves in their turn. If, in accordance with what I before said, their land below Memphis (for this is that which is increasing) shall continue to increase in height according to the same proportion as in the past time, assuredly those Egyptians who dwell here will suffer famine, if their land shall not have rain nor the river be able to go over their fields. It is certain however that now they gather in fruit from the earth with less labour than any other men and also with less than the other Egyptians; for they have no labour in breaking up furrows with a plough nor in hoeing nor in any other of those labours which other men have about a crop; but when the river has come up of itself and watered their fields and after watering has left them again, then each man sows his own field and turns into it swine, and when he has trodden the seed into the ground by means of the swine, after that he waits for the harvest, and when he has threshed the corn by means of the swine, then he gathers it in.