Question

At the end of Chapter 17, Jem seems convinced that his father was showing that Bob Ewell was likely responsible for beating up Mayella. Scout, however, was not convinced. She was still working out scenarios in her mind and paying close attention to Tom Robinson.

Jem seemed to be having a quiet fit. He was pounding the balcony rail softly, and once he whispered, “We’ve got him.”

I didn’t think so: Atticus was trying to show, it seemed to me, that Mr. Ewell could have beaten up Mayella. That much I could follow. If her right eye was blacked and she was beaten mostly on the right side of the face, it would tend to show that a left-handed person did it. Sherlock Holmes and Jem Finch would agree. But Tom Robinson could easily be left-handed, too. Like Mr. Heck Tate, I imagined a person facing me, went through a swift mental pantomime, and concluded that he might have held her with his right hand and pounded her with his left. I looked down at him. His back was to us, but I could see his broad shoulders and bull-thick neck. He could easily have done it. I thought Jem was counting his chickens.