together with walker, he created "sam's strip" in 1961. it only lasted until 1963 but was resurrected as "sam and silo" in 1977, still with walker. dumas continued the comic strip on his own from 1995 on. in 1968, he also collaborated on all aspects of the comic strip "boner's ark". apart from his work with walker, dumas also worked on other comic strips like "benchley" with mort drucker and "mccall of the wild" with mel crawford.