Passage 1.36.1
ἐν Σαλαμῖνι δὲ---ἐπάνειμι γὰρ ἐς τὸν προκείμενον λόγον---τοῦτο μὲν Ἀρτέμιδός ἐστιν ἱερόν, τοῦτο δὲ τρόπαιον ἕστηκεν ἀπὸ τῆς νίκης ἣν Θεμιστοκλῆς ὁ Νεοκλέους αἴτιος ἐγένετο γενέσθαι τοῖς Ἕλλησι· καὶ Κυχρέως ἐστὶν ἱερόν. ναυμαχούντων δὲ Ἀθηναίων πρὸς Μήδους δράκοντα ἐν ταῖς ναυσὶ λέγεται φανῆναι· τοῦτον ὁ θεὸς ἔχρησεν Ἀθηναίοις Κυχρέα εἶναι τὸν ἥρωα.
On Salamis—for I now return to the subject at hand—there is, in one place, a sanctuary of Artemis, and nearby stands the trophy set up after the victory obtained for the Greeks through the agency of Themistocles son of Neocles; also there is a shrine of Cychreus. It is said that when the Athenians were fighting the Persians at sea, a serpent appeared among the ships, concerning which the god declared to the Athenians through an oracle that this serpent was the hero Cychreus.