Passage 10.17.5
μετὰ δὲ Ἀρισταῖον Ἴβηρες ἐς τὴν Σαρδὼ διαβαίνουσιν ὑπὸ ἡγεμόνι τοῦ στόλου Νώρακι, καὶ ᾠκίσθη Νώρα πόλις ὑπὸ αὐτῶν· ταύτην πρώτην γενέσθαι πόλιν μνημονεύουσιν ἐν τῇ νήσῳ, παῖδα δὲ Ἐρυθείας τε τῆς Γηρυόνου καὶ Ἑρμοῦ λέγουσιν εἶναι τὸν Νώρακα. τετάρτη δὲ μοῖρα Ἰολάου Θεσπιέων τε καὶ ἐκ τῆς Ἀττικῆς στρατιὰ κατῆρεν ἐς Σαρδώ, καὶ Ὀλβίαν μὲν πόλιν οἰκίζουσιν, ἰδίᾳ δὲ Ὀγρύλην οἱ Ἀθηναῖοι διασώζοντες τῶν δήμων τῶν οἴκοι τινὸς τὸ ὄνομα· ἢ καὶ αὐτὸς τοῦ στόλου μετεῖχεν Ὀγρύλος. ἔστι δʼ οὖν καὶ κατʼ ἐμὲ ἔτι χωρία τε Ἰολάια ἐν τῇ Σαρδοῖ καὶ Ἰόλαος παρὰ τῶν οἰκητόρων ἔχει τιμάς.
After Aristaeus, the Iberians crossed over into Sardinia under Norax, their expedition leader, and founded the city of Nora. They relate that this city was the first to arise on the island, and Norax himself is said to have been a son of Hermes and Erytheia, the daughter of Geryon. As a fourth contingent, an army of Thespians with Iolaus, joined by settlers from Attica, landed in Sardinia. They founded the city of Olbia, while the Athenians among them separately preserved Ogryle, naming it after one of their homeland demes, unless Ogrylus himself actually participated in their expedition. Even in my time there remain places named after Iolaus in Sardinia, and he is still honored by its inhabitants.