An accusative in apposition to the whole idea of a sentence

C. Collard on E.Supp.362 refers to the following:
Schwyzer II 617;
Wilamowitz on E.Hrc.59;
Barrett on E.Hipp.753-7 (pp. 307-308;
Kannicht on E.Hel. 35-6 (w. And.103 ff. and Hel.77).