But the laſt and fatal Blow, given to that antient Learning, was in the time of Darius, Father of Xerxes, who with the reſt of the Perſians, ſpighted at the Magi, upon the Uſurpation of the Crown by one of their Number, (that counterfeited a younger Son of Cyrus after the Death of Cambyſes,) when he came to be ſetled in that Throne, endeavour'd to aboliſh, not only their Learning and Credit, but their Language too, by changing the old Aſſyrian Characters, and introducing thoſe of Perſia, which grew to be the common Uſe of that whole Empire.