twelve o'clock
`` It is a pity , '' she whispered ; `` it would have saved you such unnecessary struggle . But a week is not long to wait . I am certain of you then . This day week at twelve o'clock , Frederick . '' He seized her by the arm , and lost to everything but his rage , shook her with a desperate hand . `` Do you mean it ? '' he cried , a sudden horror showing itself in his face , notwithstanding his efforts to conceal it .