So I slid out and slipped off up the road, and there warn't anybody at the church, except maybe a hog or two, for there warn't any lock on the door, and hogs likes a puncheon floor in summer-time because it's cool. (p. 107)
Use either context clues or an outside source to help you determine the meaning of the word in bold in the passage above.
I would say the best answer is smooth log. From what I have gathered, a puncheon is like a spilt log/ slab of wood that is smooth on one side, and can be used for flooring or to make benches.