Among the Egyptians themselves, those who live in the cultivated country are the most assiduous of all men at preserving the memory of the past, and none whom I have questioned are so skilled in history. They practice the following way of life. For three consecutive days in every month they purge themselves, pursuing health by means of emetics and drenches; for they think that it is from the food they eat that all sicknesses come to men. Even without this, the Egyptians are the healthiest of all men, next to the Libyans; the explanation of which, in my opinion, is that the climate in all seasons is the same: for change is the great cause of men's falling sick, more especially changes of seasons. They eat bread, making loaves which they call “cyllestis,” of coarse grain. For wine, they use a drink made from barley, for they have no vines in their country. They eat fish either raw and sun-dried, or preserved with brine. Quails and ducks and small birds are salted and eaten raw; all other kinds of birds, as well as fish (except those that the Egyptians consider sacred) are eaten roasted or boiled.