From 1958 Boone worked at Illinois, Urbana where he was based for the rest of his life. However he liked Europe and spent much time there.
Mula 1958 Boone ay nagtrabaho sa Illinois, Urbana kung saan siya ay batay para sa natitirang bahagi ng kanyang buhay. Gayunman siya nagustuhan Europa at oras na ginugol ng marami doon.