
Mary M. answered 05/16/19
Lifetime Literature Experience Helping All Ages with Assignments
The answer lies in Chapter 1 about two-thirds into the chapter: "The misery of that house began many years before Jem and I were born...The Radleys kept to themselves...Inside the house lived a malevolent phantom...(Boo Radley is Arthur Radley)...Arthur had been running with the wrong crowd...His dad, Mr. Radley, asked judge to deliver Arthur to his care...The Radley house became reclusive...Arthur was not seen again for fifteen years." Therefore, Boo Radley was not seen in public for 15 years.