Dicaearcus of Messana in Sicily, a pupil of Aristotle (326-296 B.C.), is the author of a topographical account of Hellas, with maps, of which only fragments are preserved; he is credited with having estimated the size of the earth, and, as far as known he was the first to draw a parallel across a map. 4 This parallel, or dividing line, called diaphragm (partition) by a commentator, extended due east from the Pillars of Hercules, through the Mediterranean, and along the Taurus and Imaus (Himalaya) to the eastern ocean.
Gelo's general rule was mild, and he won fame as the champion of Hellas by his great victory over the Carthaginians at Himera.
Thus the great attempt on the part of Athens to lead a harmonious league of free Greek states for the good of Hellas degenerated into an empire which proved intolerable to the autonomous states of Greece.
Herodotus, also in the 5th century, describes them as the typical (perhaps in contrast to Athenians as the only genuine) Hellenes, and traces their numerous wanderings from (I) an original home " in Deucalion's time " in Phthiotis (the Homeric " Hellas ") in south Thessaly, to (2) Histiaeotis " below Ossa and Olympus " in north-east Thessaly (note that the historic Histiaeotis is " below Pindus " in north-west Thessaly): this was " in the days of Dorus," i.e.