In To Kill a Mockingbird, what secret does Jem reveal to Scout about what happened the night he went back to the Radley place for his pants?

Jem takes his time before he tells his sister that his pants were mended when he went back to get them. By taking his time before telling his sister, he is showing that he is growing up. He is taking time to think about things that happen to him and trying to put them into perspective. Scout notices this change in Jem and says, “It was then, I suppose, that Jem and I first begin to part company.”