ἐν πέτροισι πέτρον ἐκτρίβων → by grinding stone against stones
-ας, ἁmagistratura, cargo ἐπὶ τὰς ἀρχήιας ICr.4.233.3 (Gortina III a.C.), 4.186B.1 (Gortina II a.C.).
