four o'clock
`` How will you amuse yourself then , aunt ? '' `` I 'll adopt some boys to inherit what I shall save from his clutches . '' The bath fatigued her so she remained in her room for the rest of the day ; but she kept me busy with a hundred trifles . I wrote for her , computed interest , studied out bills of fare , till four o'clock came , and with it a fog . Nevertheless I must ride on the Avenue , and the carriage was ordered . `` Wear your silk , Margaret ; it will just about last your visit through -- the fog will use it up . '' `` I am glad of it , '' I answered .