four o'clock
`` No , Emma , you will do as I direct . One can never be too particular about returning books . You have kept it an unconscionable time . You will bring it to the vicarage at four o'clock . '' `` Please mum , I -- I ca n't at four o'clock . '' `` And pray , Emma , what is to prevent you ? '' `` I -- I 'm going to Baker 's , mum . ''