The Mysterious Knothole
As the school year ends, Scout notices something shiny in a tree at the edge of the Radley property. She discovers two pieces of chewing gum tucked into a knothole. Despite her fear of the 'poisonous' Radley house, she tastes it. Later, she and Jem find a small box containing two polished Indian-head pennies. These discoveries suggest that someone inside the Radley house may be watching the children and reaching out in a subtle, non-threatening way.