"To Kill a Mockingbird"

Boo put the blanket on Scout. We know this because everyone else was helping to put out the fire, and the children were standing in front of the Radley gate..... Boo was the only one who could have placed the blanket around Scout's shoulders without being seen.

“Mr. Nathan was at the fire,” he babbled, “I saw him, I saw him, he was tuggin‘ that mattress—Atticus, I swear…”
“That’s all right, son.” Atticus grinned slowly. “Looks like all of Maycomb was out tonight, in one way or another. Jem, there’s some wrapping paper in the pantry, I think. Go get it and we’ll—”