τὸ πλῆθος οὐκ εὐαρίθμητον ἦν → the crowd wasn't easy to count, the crowd was not small, it was not a small crowd
ὁρτή, ἡ (Α)ιων. τ. εορτή («ἐούσης ὁρτῆς τῇ Ἥρῃ», Ηρόδ.).