In Library Diodorus Siculus also has Medus killinginforms us that Perses insteadwas king of Medea, inthe Tauric Chersonese and father to Library 4.56.1Hecate. He also has him killed by Medus:
4.45.1. Since it is the task of history to inquire into the reasons for this slaying of strangers, we must discuss these reasons briefly, especially since the digression on this subject will be appropriate in connection with the deeds of the Argonauts. We are told, that is, that Helius had two sons, Aeëtes and Perses, Aeëtes being king of Colchis and the other king of the Tauric Chersonese, and that both of them were exceedingly cruel.
4.45.2. And Perses had a daughter Hecatê, who surpassed her father in boldness and lawlessness; she was also fond of hunting, and with she had no luck she would turn her arrows upon human beings instead of the beasts
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4.56.1. Speaking generally, it is because of the desire of the tragic poets for the marvelous that so varied and inconsistent an account of Medea has been given out; and some indeed, in their desire to win favour with the Athenians, say that she took that Medus who she bore to Aegeus and got off safe to Colchis; and at that time Aeëtes, who had been forcibly driven from the throne by his brother Perses, and regained his kingdom, Medus, Medea’s son, having slain Perses; and that afterwards Medus, securing the command of an army, advanced over a large part of Asia which lies above the Pontus and secured possession of Media, which has been named after this Medus.
