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At what point in Chapter 37 do Tom and Huck display real clever thinking?
In how they get the rope ladder in to Jim.
In how they are able to manipulate Nat into being an unwitting accomplice in their escape plans.
In how they trick Aunt Sally to lose track and stop caring about the missing spoons and sheets.
In how they manage to teach Jim how to write when he is illiterate.
In how they manage to find items they need in the rubbage pile rather than steal them.