Diodorus Siculus

“ Theron governed with great moderation and justice, and therefore was greatly loved and honoured by his subjects; and at his death was reverenced as a divine hero; but his son, even in his father's life-time, appeared to be of a violent and bloody disposition. ”

“ Chapter XI The death of Theron prince of Agrigentum, and the tyranny of his son Thrasideus, who abdicated the government, and killed himself. Three hundred of the family of the Fabii slain at one time. The next year Chares was archon at Athens, and at Rome, Titus Memius and Caius Horatius were consuls. Then were celebrated the Olympian games at Elis, being the seventy-seventh olympiad, in which Daneles of Argos was victor. About this time Theron king of Agrigentum died, in the sixteenth year of his reign, and Thrasideus his son succeeded. ”