οὐ γὰρ ἂν τό γε πραχθὲν ἀγένητον θείη → since he cannot make what was done as though it had not come to pass
βλάττη: ἡ, blatta, ὄνομα βαφῆς πορφυρᾶς, Ἐπιγρ. Στρατονικείας (ed. Dioclet) Leb. Wad. 535.
