In Chapter 26, Harper Lee mentions Arthur "Boo" Radley again for the first time since Tom's trial started because the author is about to join the two storylines of the novel. The chapter updates where Scout is in her school career, and this is a logical tie back to the first part of the book when Scout is consumed with school issues and Boo Radley (items that had lost her attention during the trial portion of the book).
The trial has ended now, and one of the "mockingbird's" (Tom's) stories is finished. However, the reader still does not know the outcome of the other mockingbird's (Boo's) situation. The author does not simply bring Boo back at this point to finishthe Radley plot; she had, in fact "set him aside" for a while to wait for Scout's maturation.
When the novel opens, Scout is innocent to and ambivalent about the prejudice in her town. She sees Boo Radley only as a curiosity and summer entertainment. As Scout goes through the trial with her father and the rest of the town, she matures and develops a more adult view of the world around her. At the point when the trial is over and Tom has met his unjust fate, Scout is ready socially to view Boo in a different light. She is more sympathetic to those who don't fit into Maycomb's society, and thus, she is prepared for the events which take place at the novel's end--she isfinally able to climb into another's skin and walk around in it.
In Chapter 26, Scout relates an incident where Adolf Hitler's name comes up in class, and Miss Caroline makes her first extended appearance since the day Scout starts school. Miss Gates tells the children in Scout's class that what is happening to the Jews in Germany is a result of prejudice and persecution, that what has happened to them is "one of the most terrible stories in history" and that in the United States, "we don't believe in persecuting anybody. Persecution comes from people who are prejudiced." Scout is puzzled about this, and at home that night, asks Atticus why, if Miss Gates is so offended by persecution of the Jews, would she be so"ugly about folks right at home." Scout is referring to the night coming out of the courthouse after Tom Robinson's trial when she overheard Miss Gates telling Miss Stephanie Crawford it was "time someone taught 'em a lesson, they were gettin' way above themselves. . . ."