Joyce of Quiet Life pointed me to his murals in the Missouri State Capitol, a series called "The Social History of the State of Missouri." They depict scenes from pioneer days and the history of politics, farming and the law. Three panels show local legends.
This scene, the first of those legend panels, shows Huck Finn and Jim, fishing in the Mississippi. In the background is a paddle boat with the name “Sam Clemens” (aka Mark Twain and Missouri’s most famous writer) written on the side.

More of those striking murals can be seen here.