The Question and Answer section for The Adventures of Huckleberry Finn is a great resource to ask questions, find answers, and discuss the novel.
The Duke paints Jim blues and hangs a "sick Arab" sign around his neck.... meaning crazy, This allows Jim to move about freely without worry of capture.
The King takes on the identity of Peter Wilk's brother. The King and the Duke get this information from a stranger waiting to meet a ferry. The King gathers all the information he can, as he intends to pretend to be Wilk's brother and steal the...
The robbers were not the brightest pair so I am not surprised.