Little Nell and her grandfather a going with the Punch and Judy playes to the races. The meet some other players, and Mr.Codlin, who is inside the miniature stage, speaks to a group they meet, from the opening (here called the proscenium) through which the puppets are seen when they perform. Here is a URL with pictures of Punch and Judy
portable theatres:
http://www.punchandjudy.com/harpers1.htm