In Chapter 7 of "To Kill a Mockingbird" by Harper Lee, several items are found in the oak tree's knothole. Here are the items mentioned:
1. Two pieces of chewing gum: Scout and Jem find two sticks of gum, each still wrapped in tin foil.
2. Indian head pennies: They discover two Indian head pennies, which Scout describes as being worth a fortune.
3. Whittled figures: Scout and Jem find two small, carved figures resembling Scout and Jem themselves. These figures seem to be made specifically for them.
4. A pocket watch on a chain: They find a tarnished pocket watch attached to a chain with an aluminum knife handle.
These items symbolize the mysterious connection between Scout, Jem, and Boo Radley, and also serve as a way for Boo Radley to connect with the outside world.