His "Seven Dreams" released in 1953 included "Crescent City Blues", which was the source for Johnny Cash's popular recording, "Folsom Prison Blues". In 1956, he expanded "Manhattan Tower" to almost three times its length, released it (this time on Capitol Records), and performed it on an hour-long television show. (Both versions of "Manhattan Tower" are currently available on CD.) His final long-form work was "The Future", which made up the entire third disk of Frank Sinatra's 1980 Grammy-nominated "" album. Although the piece was savaged by critics, Sinatra reportedly loved the semi-biographical work and felt that Jenkins was treated unfairly by the media.