τὸ πλῆθος οὐκ εὐαρίθμητον ἦν → the crowd wasn't easy to count, the crowd was not small, it was not a small crowd
v.
Ar. and V. δοκῶ (rare P.). Methinks you will win my heart: V. θέλξειν μʼ ἔοικας (Aesch., Eum. 900). Methought in my sleep that I dwelt in Argos: V. ἔδοξʼ ἐν ὕπνῳ . . . οἰκεῖν ἐν Ἄργει (Eur., I.T. 44).