τὸ πλῆθος οὐκ εὐαρίθμητον ἦν → the crowd wasn't easy to count, the crowd was not small, it was not a small crowd
νερόν: τό, ἴδε νηρόν. ― Πρβλ. καὶ Γ. Χατζιδάκην ἐν Ἀθηνᾶς τ. 4, σ. 466 κἑξ.