First, Jem accepts Dill's dare to run up and slap the side of the Radley house. Jem wins Dill's copy of The Gray Ghost and discovers that the wrath of the Radleys did not extend to him. Then, the gifts began appearing in the knothole of the Radley oak. Scout did not die from the possibly-poisoned chewing gum, and the next present--Indian-head pennies--were deemed lucky by Jem. When Scout rolled in the tire to a stop at the Radley's front steps, she escaped without injury, and Jem fearlessly retrieved the tire from the Radley property. Scout also received another sign that was both confusing and reassuring:
I had heard another sound, so low I could not have heard it from the sidewalk. Someone inside the house was laughing. (Chapter 4)
Later more gifts appeared in the knothole, and then came the mysteriously mended pants Jem found hanging from the Radley's back fence. The final sign that Boo was no one to be feared came when Scout found a blanket placed upon her shoulders for warmth on the night of Miss Maudie's house fire. When Atticus explained that it could have only come from Boo, Scout's
... stomach turned to water and I nearly threw up..., (Chapter 8)
but Jem decided that his fear of Boo was a thing of the past.
"I ain't gonna do anything to him..." (Chapter 8)