a quarter to four
But Tom was obdurate . `` You go if you want to , '' he said , `` but I 'm going to sit down right here and wait . You can leave your bag and I 'll look after it . Only , if you do n't get back by a quarter to four I 'm going to the train , and I 'll take your bag with me . '' `` All right . I just want to go out front awhile . I 'll be back in ten minutes .