midnight
`` My lord , '' she cried , `` you can not do this thing ! You can not do it ! '' But instead of moving him to generosity , by those very words she steeled his heart against it , and proved to him that , after all , his potentialities for evil were strong enough to enable him to do the very thing she said he could not . His brow grew black as midnight ; his dark eyes raked her face , and saw the agony of apprehension for her lover written there . He drew breath , hissing and audible , glanced once at Caryll ; then : `` A moment ! '' said he . He strode to the door and called the footmen , then turned again .