Passage 8.25.3
τὸ δὲ ἱερὸν τοῦτο ἔστι μὲν Θελπουσίων ἐν ὅροις· ἀγάλματα δὲ ἐν αὐτῷ, ποδῶν ἑπτὰ οὐκ ἀποδέον ἕκαστον, Δήμητρός ἐστι καὶ ἡ παῖς καὶ ὁ Διόνυσος, τὰ πάντα ὁμοίως λίθου. μετὰ δὲ τῆς Ἐλευσινίας τὸ ἱερὸν καὶ Θέλπουσαν τὴν πόλιν ὁ Λάδων παρέξεισιν ἐν ἀριστερᾷ, κειμένην μὲν ἐπὶ λόφου μεγάλου, τὰ πλείω δὲ ἐφʼ ἡμῶν ἔρημον, ὥστε καὶ τὴν ἀγορὰν ἐπὶ τῷ πέρατι οὖσάν φασιν ἐν τῷ μεσαιτάτῳ ποιηθῆναι τὸ ἐξ ἀρχῆς. ἔστι δὲ ἐν Θελπούσῃ ναὸς Ἀσκληπιοῦ καὶ θεῶν ἱερὸν τῶν δώδεκα·
This sanctuary lies within the territory of Thelpousa. Inside, there are stone statues, each nearly seven feet tall, representing Demeter, her daughter, and Dionysus, all similarly made of stone. Past the sanctuary of Eleusinian Demeter, the Ladon river flows by the city of Thelpousa on the left. The city is positioned upon a lofty hill but has been mostly deserted in our times, so that even the agora, which is now at its farthest edge, was originally situated in the very center. In Thelpousa, there is a temple devoted to Asklepios, as well as a sanctuary to the Twelve Gods.