The date of the Magians, beginning with Zoroaster the Persian, was 5000 years before the fall of Troy, as given by Hermodorus the Platonist in his work on mathematics ; but Xanthus the Lydian reckons 6000 years from Zoroaster to the expedition of Xerxes, and after that event he places a long line of Magians in succession, bearing the names of Ostanas, Astrampsychos, Gobryas, and Pazatas, down to the conquest of Persia by Alexander. These authors forget that the achievements which they attribute to the barbarians belong to the Greeks, with whom not merely philosophy but the human race itself began. For instance, Musaeus is claimed by Athens, Linus by Thebes. It is said that the former, the son of Eumolpus, was the first to compose a genealogy of the gods and to construct a sphere, and that he maintained that all things proceed from unity and are resolved again into — unity. He died at Phalerum, and this is his epitaph @: Musaeus, to his sire Eumolpus dear, In Phalerean soil lies buried here ; and the Eumolpidae at Athens get their name from the father of Musaeus. Linus again was (so it is said) the son of Hermes and the Muse Urania. He composed a poem describing the creation of the world, the courses of the sun and moon, and the growth of animals and plants. His poem begins with the line : Time was when all things grew up at once ; and this idea was borrowed by Anaxagoras when he