ἐν πέτροισι πέτρον ἐκτρίβων → by grinding stone against stones
căvannus: i, m., = κικκάβη,I the nightowl, Anthol. Lat. 5, 134, 29 Burm.
căvannus, ī, m., chouette hulotte : Euch. Instr. 2, 9.
