Passage 6.12.8
Ἀγήσαρχον δὲ τὸν Αἱμοστράτου Τριταιέα κρατῆσαι μὲν πύκτας ἄνδρας ἐν Ὀλυμπίᾳ καὶ Νεμέᾳ τε καὶ Πυθοῖ καὶ ἐν Ἰσθμῷ μαρτυρεῖ τὸ ἐλεγεῖον, Ἀρκάδας δὲ τοὺς Τριταιεῖς εἶναι τοῦ ἐλεγείου λέγοντος οὐκ ἀληθεύοντα εὕρισκον. πόλεων γὰρ τῶν ἐν Ἀρκαδίᾳ ταῖς μὲν ἐπειλημμέναις δόξης οὐδὲ τὰ ἐς τοὺς οἰκιστάς ἐστιν ἄγνωστα, τὰς δὲ ἐξ ἀρχῆς τε ὑπὸ ἀσθενείας ἀφανεστέρας καὶ διʼ αὐτὸ ἀνοικισθείσας ἐς Μεγάλην πόλιν, οὐ περιέχει σφᾶς γενόμενον τότε ὑπὸ τε τοῦ Ἀρκάδων κοινοῦ δόγμα;
An elegiac inscription bears witness that Agesarchus, son of Haemostratus, a native of Tritaia, triumphed as a men's boxer at Olympia, Nemea, Pytho, and the Isthmus. Yet concerning the claim of this elegiac couplet that the people of Tritaia are Arcadians, I found that the claim is untrue. For regarding the cities of Arcadia, those renowned have not even their founders unknown; whereas those from their inception insignificant and obscure, which consequently were later incorporated into Megalopolis—is not their inclusion at that time sufficiently shown by the decree of the Arcadian League itself?