(...)
"But Cal," Jem protested, "you don't look even near as old as Atticus."
"Colored folks don't show their ages so fast," she said.
"Maybe because they can't read."
(...)
"Cal," I asked, "why do you talk nigger-talk to the-- to your folks when you know it's not right?"
"Well, in first place I'm black."
"That doesn't mean you hafta talk that way when you know better," said Jem.
[Harper Lee (1926)]