How does Huck arrange things so that Jim doesn't lie in the wigwam all day to avoid being thought a runaway slave?

To avoid tying Jim up in ropes during the day (since he has been pretending to be a runaway slave), the Duke figures out a better solution. He paints Jim in blue and makes him wear a costume. Then, he writes a sign that reads, "Sick Arab - but harmless when not out of his head." Jim is happy that he can now move around.