In reply to Ron Allen's question about the near-quotation, "He preached for
nothing and it was worth it," here's the exact quotation and the paragraph
it appears in (Chapter 33 of Adventures of Huckleberry Finn; Oxford Mark
Twain Edition):

        That's all he said. He was the innocentest, best old soul I ever see. But
it warn't surprising; because he warn't only just a farmer, he was a
preacher, too, and had a little one-horse log church down back of the
plantation, which he built it himself at his own expense, for a church and
school-house, and never charged nothing for his preaching, and it was worth
it, too. There was plenty other farmer-preachers like that, and done the
same way, down South.

                                --Jim Leonard