Passage 8.34.5
ἐκ Μανιῶν δὲ ὁδὸς ἐπὶ τὸν Ἀλφειόν ἐστιν ὅσον πέντε σταδίων καὶ δέκα· κατὰ τοῦτο Γαθεάτας ποταμὸς ἐκδίδωσιν ἐς τὸν Ἀλφειόν, ἐς δὲ τὸν Γαθεάταν πρότερον ἔτι κάτεισιν ὁ Καρνίων. τούτῳ μὲν δὴ αἱ πηγαὶ γῆς εἰσι τῆς Αἰγύτιδος ὑπὸ τοῦ Ἀπόλλωνος τοῦ Κερεάτα τὸ ἱερόν, τῷ Γαθεάτᾳ δὲ τῆς Κρωμίτιδος χώρας ἐν Γαθέαις.
From Maniae there is a road leading to the Alpheios of about fifteen stades. At this point, the river Gatheatas flows into the Alpheios, and earlier still the Karnion descends into the Gatheatas. The springs of this Karnion lie in the territory of Aigytis, below the sanctuary of Apollo Kereatas, while the springs of the Gatheatas are located in the district of Kromitis, at Gatheai.