What is a quote from To Kill a Mockingbird that describes Jem Finch physically?

There are not very many physical descriptions of Jem Finch in To Kill a Mockingbird. We know that he is taller than his younger sister, and taller than Dill, but that doesn’t tell us much about his looks. I found three quotes that give us little snippets of what he looked like physically; I’ll give you one and clues to find the other two.
In chapter 15, Scout, Jem, and Dill follow Atticus into town and find him keeping watch by the jail. The children surprise the group of men that show up that evening. Atticus asks them to go home, but Jem refuses. “Jem shook his head. As Atticus’s fists went to his hips, so did Jem’s, and as they faced each other I could see little resemblance between them: Jem’s soft brown hair and eyes, his oval face and snug-fitting ears were our mother’s contrasting oddly with Atticus’s graying black hair and square-cut features, but they were somehow alike.”
There is another small clue to Jem’s appearance when they find the figures of themselves in the tree knothole in chapter 7. Skim that chapter and you’ll find the section where Jem lets Scout pull the treasure out of the knothole.
Another little detail is found right at the beginning of the book, where we find out that Jem’s arm was broken, and it caused his left arm to be shorter than his right. That should be an easy quote to spot.
Lee, Harper. To Kill a Mockingbird. (Soft Cover). Perennial, 1961.