eight o'clock
Doctor Hugh warned Sarah . `` However , children , let 's not have any quarrels on a fair night . How late are they going to keep this up , Rosemary ? '' `` Only till eight o'clock , '' Rosemary answered . `` We have to go back , now , Hugh , and serve at the tables . Are you and Aunt Trudy coming up ? '' `` Right away , '' he assured her .