[4] suffixum in cruce: kept upon the rack. The reference is perhaps to the punishment by impalement, rarer and more dreaded than the ordinary forms of crucifixion; cf. Sen. Con. 20.3 “video istic cruces non unius quidem generis, sed aliter ab aliis fabricatas … alii per obscoena stipitem egerunt” ; Sen. Ep. 101.12 “suffigas licet et acutam sessuro crucem subdas” .