Since this is the description given by Eudoxus, a mathematician and an expert both in geometrical figures and in "climata,"1
and acquainted with these places, one must conceive of this side of Attica together with Megaris—the side extending from Sunium to the Isthmus—as concave, though only slightly so. Now here, at about the center of the aforesaid line, is the Peiraeus, the seaport of Athens. It is distant from Schoenus, at the Isthmus, about three hundred and fifty stadia, and from Sunium three hundred and thirty. The distance from the Peiraeus to Pagae also is nearly the same as to Schoenus, though the former is said to exceed the latter by ten stadia. After doubling Sunium one's voyage is towards the north, but with an inclination towards the west.