Note 157 — Chapter LXXXIV · SICILIAN AFFAIRS AFTER THE DEATH OF THE ELDER DIONYSIUS — DIONYSIUS THE YOUNGER — AND DION.
Reading edition
The story is found in Plutarch (Dion, c. 14), who refers to Timæus as his authority. It is confirmed in the main by Plato, Epistol. vii. p. 329 D. μηνὶ δὴ σχεδὸν ἴσως τετάρτῳ Δίωνα Διονύσιος, αἰτιώμενος ἐπιβουλεύειν τῇ τυραννίδι, σμικρὸν εἰς πλοῖον ἐμβιβάσας, ἐξέβαλεν ἀτίμως.
Diodorus (xvi. 6) states that Dionysius sought to put Dion to death, and that he only escaped by flight. But the version of Plato and Plutarch is to be preferred.
Justin (xxi. 1, 2) gives an account, different from all, of the reign and proceedings of the younger Dionysius. I cannot imagine what authority he followed. He does not even name Dion.