Passage 3.20.7
ἐκ τούτου δὴ τοῦ Ἕλους ξόανον Κόρης τῆς Δήμητρος ἐν ἡμέραις ῥηταῖς ἀνάγουσιν ἐς τὸ Ἐλευσίνιον. πεντεκαίδεκα δὲ τοῦ Ἐλευσινίου σταδίους ἀφέστηκε Λαπίθαιον καλούμενον ἀπὸ ἀνδρὸς ἐγχωρίου Λαπίθου· τοῦτό τε οὖν τὸ Λαπίθαιόν ἐστιν ἐν τῷ Ταϋγέτῳ καὶ οὐ πόρρω Δέρειον, ἔνθα Ἀρτέμιδος ἄγαλμα ἐν ὑπαίθρῳ Δερεάτιδος, καὶ πηγὴ παρʼ αὐτῷ ἣν Ἄνονον ὀνομάζουσι. μετὰ δὲ τὸ Δέρειον σταδίους προελθόντι ὡς εἴκοσιν ἔστιν Ἅρπλεια καθήκοντα ἄχρι τοῦ πεδίου.
From this place called Helos they bring an ancient wooden image of the Maiden, daughter of Demeter, to the Eleusinion during certain prescribed days. Fifteen stades from the Eleusinion stands a place called Lapithaeum, named for a local man called Lapithus. This Lapithaeum is situated on Mount Taygetus, and not far from it is Dereium, where there is an open-air statue of Artemis Dereatis and near it a spring they name Anonus. About twenty stades beyond Dereium lies Harpleia, which extends to the edge of the plain.