four o'clock
`` We must be off . I hope you wo n't get in any fresh scrapes while we are away , Randy . You had better stay about camp . You may look for us back some time this afternoon -- not later than four o'clock . '' `` Oh , I wo n't have time to get in mischief , '' laughed Randy . `` It will take all day to write my log book up to date . I have n't touched it since night before last . ''