one o'clock
It is early , and I can never sleep here if I go to bed . Sit with me for half-an-hour , and then perhaps you could give me some supper ? '' He shook his head . `` I am so sorry , '' he answered , `` but at one o'clock I have an appointment . '' `` An appointment ? '' `` Such bad luck , '' he continued . `` It would have given me very great pleasure to have had supper with you , Violet . ''