six o'clock
`` Well , what is it ? '' demanded Whitney , jerking open the door . `` Oh , my dear , '' his tone changing at sight of his wife , `` I had no idea you were returning so soon . '' `` Do you call half-past six o'clock soon ? '' asked Mrs. Whitney following him into the room . `` Winslow , Winslow , I warn you not to become too absorbed in your work . '' Whitney laughed somewhat ruefully .