five o'clock
No ? The birthday of a school-friend , then ? She might suddenly have remembered such an occasion , and rushed out to post a letter -- '' `` But there is no post until to-morrow morning , so she would gain no time by doing that . The postman called at five o'clock , and the letters were on the hall-table waiting for him as usual . I do not know of any work that she had on hand , but the girls have complained that she has spent all her spare time in her room lately , and when I spoke to her about it she said she was writing -- '' `` Perhaps she is writing a book , '' suggested Mellicent thoughtfully . `` She says she is going to be an authoress when she grows up . I think Robert knew what she was doing .