Passage 8.31.9
τῆς στοᾶς δὲ ἣν ἀπὸ τοῦ Μακεδόνος Φιλίππου καλοῦσι, ταύτης εἰσὶ δύο ὄπισθεν λόφοι, οὐκ ἐς ὕψος ἀνήκοντες· ἐρείπια δὲ Ἀθηνᾶς ἱεροῦ Πολιάδος ἐπὶ αὐτῷ, καὶ τῷ ἑτέρῳ ναός ἐστιν Ἥρας Τελείας, ὁμοίως καὶ ταῦτα ἐρείπια. ὑπὸ τούτῳ τῷ λόφῳ Βάθυλλος καλουμένη πηγὴ συντελεῖ καὶ αὕτη τῷ ποταμῷ Ἑλισσόντι ἐς μέγεθος.
Behind the colonnade called after Philip of Macedon are two hills, neither of considerable height. On one of these stand the ruins of a sanctuary of Athena Polias, and upon the other hill is a temple of Hera Teleia—this too now lies in ruins. Beneath this second hill is a spring called Bathyllos, which also contributes significantly to the size of the river Helisson.