twelve o'clock
Go out of the room , sir ! '' exclaimed Mr. Stevens , with a disturbed countenance . `` Come , George , go to bed , '' urged his sister wearily . `` Let father sleep -- it is after twelve o'clock . I am going to wake the nurse , and then retire myself . '' George rose stupidly from his chair , and followed his sister from the room . On the stairway he grasped her arm rudely , and said , `` I do n't understand how it is that you and the old man are so cursed thick all of a sudden .