6. Then secondly, as to Egypt itself, the extent of it along the sea is sixty schoines, according to our definition of Egypt as extending from the Gulf of Plinthine to the Serbonian lake, along which stretches Mount Casion; from this lake then 242 the sixty schoines are reckoned: for those of men who are poor in land have their country measured by fathoms, those who are less poor by furlongs, those who have much land by parasangs, and those who have land in very great abundance by schoines: now the parasang is equal to thirty furlongs, and each schoine, which is an Egyptian measure, is equal to sixty furlongs. So there would be an extent of three thousand six hundred furlongs for the coastland of Egypt. 243 7. From thence and as far as Heliopolis inland Egypt is broad, and the land is all flat and without springs of water 244