Passage 10.28.1
τὸ δὲ ἕτερον μέρος τῆς γραφῆς τὸ ἐξ ἀριστερᾶς χειρός, ἔστιν Ὀδυσσεὺς καταβεβηκὼς ἐς τὸν Ἅιδην ὀνομαζόμενον, ὅπως Τειρεσίου τὴν ψυχὴν περὶ τῆς ἐς τὴν οἰκείαν ἐπέρηται σωτηρίας· ἔχει δὲ οὕτω τὰ ἐς τὴν γραφήν. ὕδωρ εἶναι ποταμὸς ἔοικε, δῆλα ὡς ὁ Ἀχέρων, καὶ κάλαμοί τε ἐν αὐτῷ πεφυκότες καὶ ἰχθύες· ἔστι δʼ ἀμυδρὰ οὕτω δή τι τὰ εἴδη τῶν ἰχθύων ὡς σκιὰς μᾶλλον ἢ ἰχθῦς εἰκάσεις. καὶ ναῦς ἐστιν ἐν τῷ ποταμῷ καὶ ὁ πορθμεὺς ἐπὶ ταῖς κώπαις.
The other part of the painting, on the left side, depicts Odysseus descending to the place known as Hades, to inquire of the soul of Teiresias about his safe return home. The painting appears as follows: there is water resembling a river, clearly the Acheron, in which reeds grow and fish can be seen. But the forms of these fish are very indistinct, so much so that you would think them more like shadows than actual fish. A boat is on the river, and the ferryman is at the oars.