Suetonius, Lives of Illustrious Men (On Rhetoricians)
28 Marcus Epidius, famous for blackmailing people, started a school of elocution and among others he taught Marcus Antonius and Augustus. When these two were once mocking Tiverous Cannutius because he aligned himself with the powerful faction of the the ex-consul Isauricus, Cannutius responded that he would prefer to be a student of Isaurius instead of a slanderer like Epidius.
This Epidius maintained that he was descended from Gaius Epidius from Nucerina. People claim that he jumped into the headwaters of the Sarnus river and came out soon after with golden horns on his head. Immediately he vanished and was counted in the number of the gods.”
Epidius, calumnia notatus, ludum dicendi aperuit docuitque inter ceteros M. Antonium et Augustum; quibus quondam Ti. Cannutius, obicientibus sibi quod in re p. administranda potissimum consularis Isaurici sectam sequeretur, malle respondit Isaurici esse discipulum quam Epidi calumniatoris. Hic Epidius ortum se a C. Epidio Nucerino praedicabat, quem ferunt olim praecipitatum in fontem fluminis Sarni, paulo post cum cornibus aureis exstitisse, ac statim non comparuisse in numeroque deorum habitum.