ten o'clock
I had had but half a night 's sleep last night ; and this night I must remain awake . Without stating my intention , for I feared that I might add to the trouble and uneasiness of Miss Trelawny , I went downstairs and out of the house . I soon found a chemist 's shop , and came away with a respirator . When I got back , it was ten o'clock ; the Doctor was going for the night . The Nurse came with him to the door of the sick-room , taking her last instructions . Miss Trelawny sat still beside the bed . Sergeant Daw , who had entered as the Doctor went out , was some little distance off .