In 1960, Marshall returned to Kansas City to help Thomas Hart Benton prepare his mural "Independence and the Opening of the West" in the Truman Library.In this silent video, you can see Marshall working on the mural from 2:56 to 4:43: https://www.youtube.com/watch?v=T4YCbS636Cg Marshall also assisted Benton prepare his murals for the New York Power Authority.Who's Who in American Art, 2004. Back in Kansas City, Marshal made his living doing art restoration, continuing to create art, but not exhibiting very often. In his last years, he went to live with his daughter in Lumberton, New Jersey, where he died in 2010.
