nine o’clock
When do you go back ? '' `` Well , I thought of taking the night mail , but I feel so tired . I really do n't know . I think I shall go by the nine o'clock train to-morrow . '' `` That will suit me very well , '' said Geoffrey ; `` and now what are you going to do to-night ? You had better come and dine and sleep at my house . No dress clothes ?