where did millie crocker Harris send taplow to and what will happen if Mr crocker Harris come before taplow

When mrs harris saw taplow waiting there for her husband she told taplow that he can go outside and enjoy as mr harris will be late as he had gone to bursars. But taplow disagrees wth tht and sys tht wht if mr harris comes before him then mrs harris gave him a prescription of medici es and told him to fetch medicines and said that if mr harris come before u i will say that he has gone to do ur work.