Passage 2.20.6
τῶν δὲ ἀνδριάντων οὐ πόρρω δείκνυται Δαναοῦ μνῆμα καὶ Ἀργείων τάφος κενὸς ὁπόσους ἔν τε Ἰλίῳ καὶ ὀπίσω κομιζομένους ἐπέλαβεν ἡ τελευτή. καὶ Διός ἐστιν ἐνταῦθα ἱερὸν Σωτῆρος καὶ παριοῦσίν ἐστιν οἴκημα· ἐνταῦθα τὸν Ἄδωνιν αἱ γυναῖκες Ἀργείων ὀδύρονται. ἐν δεξιᾷ δὲ τῆς ἐσόδου τῷ Κηφισῷ πεποίηται τὸ ἱερόν· τῷ δὲ ποταμῷ τούτῳ τὸ ὕδωρ φασὶν οὐ καθάπαξ ὑπὸ τοῦ Ποσειδῶνος ἀφανισθῆναι, ἀλλὰ ἐνταῦθα δὴ μάλιστα, ἔνθα καὶ τὸ ἱερόν ἐστι, συνιᾶσιν ὑπὸ γῆν ῥέοντος.
Not far from these statues is shown the tomb of Danaus, as well as an empty burial place of the Argives, honoring those who died either at Troy or on their journey home. There is also here a sanctuary of Zeus the Savior, and near it is a building where the Argive women mourn for Adonis. To the right of the entrance is a sanctuary dedicated to Cephisus; it is said that the waters of this river were hidden from sight by Poseidon, not all at once, but especially at this spot, where its sanctuary stands, they sink underground as the river flows beneath.