one o'clock
`` It is to ring up Miss Arsdale 's house at once , sir . '' `` When did you get that ? '' demanded Donaldson , as he sprang from his bed . `` This morning , sir , at one o'clock . '' In three strides Donaldson was across the room . The hotel attendants crowded one another in their efforts to get out . Donaldson gave the number and waited , every pulse beat of time throbbing hot through his temples .