τὸ πλῆθος οὐκ εὐαρίθμητον ἦν → the crowd wasn't easy to count, the crowd was not small, it was not a small crowd
τοιχογραφέω: γράφω ἢ ζωγραφῶ ἐπὶ τοίχου, Ἰγνάτ. σ. 55Α, Θεόδ. Στουδ. σ. 135Β, 142Ε, 143Β, 158D.