of various regimes is borrowed from the Republic and that the explanation of when it is beneficial to give counsel seems borrowed from the Seventh Letter; this suggests that the author had these works before his eyes and was conscientiously trying to sound like Plato when he was writing the Fifth Letter, which would more likely be the case if he were a forger than Plato attempting to be consistent with himself. He also notes that there is no need to defend Plato's abstention from politics given the ostensive purpose of the letter, which is to recommend Euphraeus' competence. Having concluded from this that Plato is not the author, Bury speculates that, "Unless the writer were himself a monarchist, the ascription of this letter to Plato may have been due (as has been suggested) to a malicious desire to paint Plato as a supporter of Macedon and its tyrants." There is some suggestion that Plato did have some relationship with Perdiccas, though it is difficult to determine the degree to which the Fifth Letter influenced this perception, and thus the relevance of this material in examining its authenticity. A fragment of Carystius' Historical Notes preserved by Athenaeus in Book XI of the Deipnosophistae reports that "Speusippus, learning that Philip was uttering slanders about Plato, wrote in a letter something of this sort: 'As if the whole world did not know that Philip acquired the beginning of his kingship through Plato’s agency. For Plato sent to Perdiccas Euphraeus of Oreus, who persuaded Perdiccas to portion off some territory to Philip. Here Philip kept a force, and when Perdiccas died, since he had this force in readiness, he at once plunged into the control of affairs.'" Demosthenes notes in his Third Philippic that Euphraeus once resided in Athens, and portrays him as being active in politics, albeit in opposition to Philip. Sixth Letter The Sixth Letter is addressed to Hermias, tyrant of Atarneus, and to Erastus and Coriscus, two pupils of Plato residing in Scepsis (a town near Atarneus), advising them to become friends. The letter claims that Plato never met Hermias, contrary to the account given of the latter's life by Strabo; contains a number of parallels to the Second Letter concerning the value of combining wisdom with power, the utility of referring disputes to its author, and the importance of reading and re-reading it; and concludes that all three addresses