six o'clock
`` You ought to , '' said she . `` You 've druv it times enough . '' `` What will you do with yourself all day , Alice ? I must go to the State House on business , but I 'll be back by six o'clock . '' `` If I were home I 'd have my horse saddled and have a ride out to the Arboretum or Chestnut Hill . '' `` They 've no saddle horses here , unfortunately . I 'll tell you what to do .