Menalkes' visit to Delphi is discussed by A.Cinalli, "Οὐ τὸ νικᾶν ἀλλὰ τὸ εὖ ἀγωνίζεσθαι : Playing to win or to show off?", paras.4-6 ( CHS Research Bulletin ).
In the year of Emmenidas as archon at Delphi, with the following men acting as hieromnemon:
Since Menalkes the citharode, when he visited Delphi for the Soteria, participated well and honourably in the rest of the contest, and in addition donated the contest to the god and to the Amphictyons . . . with good fortune, it is resolved by the hieromnemones to praise Menalkes of Athens, the son of Speuson, on account of his virtue and his goodwill towards the god and the Amphictyons, and to crown him a wreath of the god's laurel; and the award of the crown shall be announced at [the Soteria in the gymnastic contest] . . .
Attalus' home page | 13.02.16 | Any comments?