I don't remember, but Tom could have had a promising career in sales.
The fence occurs in
Tom Sawyer, and most of the non-PC words occur in
Huckleberry Finn. I reread
Huckleberry Finn a few years ago, during one of the perennial controversies about whether it should be in the schools. My conclusion was mixed.
Yes, it absolutely should be taught. It's a great, if flawed, novel, and hidden under the conventions of the times Twain uses humor to scathingly show up and condemn the attitudes of the time. But,
no, the non-PC language is so bad that if I were a black student reading it, I would find it very painful. The black slave Jim is the real hero of the book, and the most honorable character in it, but Twain is stuck in the conventions of his time, and has to make his message seem less threatening to his audience by low humor. I
don't think the answer is to change the language. That just makes it seem stupid.
By the way, I read recently that Huckleberry Finn was closely based on a real person, who eventually ended up as a judge in Montana. Ah, the good old days, when you could just light out for farther west and make good.