When huck is telling mary jane about his plan to unmask the phony "uncles," why can't he tell her where he has put her stolen money?

Huck can't tell Mary Jane where he has put her stolen money because he has hidden it somewhere no one can get it -- in her uncle Peter's coffin.

To make matters worse, before he can get the money, the coffin is sealed shut. As a result, when Huck is telling Mary Jane about his plan to unmask the phony "uncles," he does not mention where he hid the stolen money.