There appears to be an immediate understanding between Scout and Boo. Why do you think this is so?

I love this part of the story. Boo comes out of the shadows of the kitchen and Scout simply says, "hey Boo". Instead of fright, excitement or shock,Scout treats him like an old friend. It is as if she knew this man was more than a "benevolent phantom". Scout has matured a lot and has understood that, even though they had not seen each other, they still had a relationship. It was a relationship made of small gifts and childish pranks. In the end it became a union of understanding that transcended all the fear and gossip in Maycomb.