going over them by name. Very clearly the author Megasthenes, the contemporary of Seleucus Nicanor, writes as follows in the third of his books, On Indian Affairs: “All that was said about nature by the ancients is said also by those who philosophise beyond Greece: some things by the Brahmins among the Indians, and others by those called Jews in Syria.” Some more fabulously say that certain of those called the Idæan Dactyli were the first wise men; to whom are attributed the invention of what are called the “Ephesian letters,” and of numbers in music. For which reason dactyls in music received their name. And the Idæan Dactyli were Phrygians and barbarians. Herodotus relates that Hercules, having grown a sage and a student of physics, received from the barbarian Atlas, the Phrygian, the columns of the universe; the fable meaning that he received by instruction the knowledge of the heavenly bodies. And Hermippus of Berytus calls Charon the Centaur wise; about whom, he that wrote The Battle of the Titans says, “that he first led the race of mortals to righteousness, by teaching them the solemnity of the oath, and propitiatory sacrifices and the figures of Olympus.” By him Achilles, who fought at Troy, was taught. And Hippo, the daughter of the Centaur, who dwelt with Æolus, taught him her father’s science, the knowledge of physics. Euripides also testifies of Hippo as follows:—