30.

After Heliopolis is the “Nile above the Delta.” The country on the right hand, as you go up the Nile, is called Libya, as well as that near Alexandreia and the lake Mareotis; the country on the left hand is called Arabia. The territory belonging to Heliopolis is in Arabia, but the city Cercesura is in Libya, and situated opposite to the observatory of Eudoxus. For there is shown an observing station in front of Heliopolis, as there is in front of Cnidus, where Eudoxus marked certain motions of the heavenly bodies. This is the Letopolite Nome.

In sailing up the river we meet with Babylon, a strong fortress, built by some Babylonians who had taken refuge there, and had obtained permission from the kings to establish a settlement in that place. At present it is an encampment for one of the three legions which garrison Egypt. There is a mountainous ridge, which extends from the encampment as far as the Nile. At this ridge are wheels and screws, by which water is raised from the river, and one hundred and fifty prisoners are [thus] employed.

The pyramids on the other side [of the river] at Memphis may be clearly discerned from this place, for they are not far off.