What happened in the pages of 4 to 25 of the book To Kill A Mocking Bird?

After school one day, she passes the Radley Place and sees some tinfoil sticking out of a knothole in one of the Radleys' oak trees. Scout reaches into the knothole and discovers two pieces of chewing gum ... Summer comes at last, school ends, and Dill returns to Maycomb.

Explanation:

that's that's the only part I can remember