Miss Maudie's house caught on fire on the coldest night in years. Scout and Jem went outside while the others fought the fire. Atticus told them to stay a safe distance away, so they waited by the gate to the Radley house. They did not move all night while everyone else fought the fire or watched it. When dawn came, they went back home. While there, Scout realized she was "clutching a brown woolen blanket... around [her] shoulders, squaw-fashion" (To Kill a Mockingbird, Chapter 8). Atticus asked her where it had come from, but Scout did not know. It could not have been from Mr. Nathan Radley, because he had been fighting the fire. Jem realized that the only one not out by the fire was Boo Radley.
Atticus wanted them to return the blanket, but Jem protested. He was concerned about Mr. Nathan finding out that Boo had left the house to cover Scout with the blanket. Jem thought Mr. Nathan was a crazy man. He was afraid of what would happen if he found out about Boo and the blanket.