Passage 5.3.3
Φυλέως δέ, ὡς τὰ ἐν τῇ Ἤλιδι κατεστήσατο, αὖθις ἐς Δουλίχιον ἀποχωρήσαντος, Αὐγέαν μὲν τὸ χρεὼν ἐπέλαβε προήκοντα ἐς γῆρας, βασιλείαν δὲ τὴν Ἠλείων Ἀγασθένης ἔσχεν ὁ Αὐγέου καὶ Ἀμφίμαχός τε καὶ Θάλπιος· Ἄκτορος γὰρ τοῖς παισὶν ἀδελφὰς ἐσαγαγομένοις διδύμας ἐς τὸν οἶκον, Δεξαμενοῦ θυγατέρας ἐν Ὠλένῳ βασιλεύοντος, τῷ μὲν ἐκ Θηρονίκης Ἀμφίμαχος, Εὐρύτῳ δὲ ἐκ Θηραιφόνης ἐγεγόνει Θάλπιος.
When Phyleus, after establishing affairs in Elis, retired again to Dulichium, Augeas met his destined end, advanced in old age. Then Agasthenes, son of Augeas, received the kingship of the Eleans along with Amphimachus and Thalpius. For the sons of Actor had brought as wives into their house twin sisters, daughters of Dexamenus, who reigned at Olenus; and from Theronice was born Amphimachus, while Thalpius was born to Eurytus from Theraephone.