Hello from Iowa. I found some info on Lewis just this month at the library. Lewis married a second time to Mable (Duncan) Lindley, on October 19, 1965 in Lone Tree, Johnson County, IA. She died November 13, 1974 and is buried with her first husband, George Lindley in Clarinda, Iowa at the Clarinda City Cemetery.
Says that Lewis died December 15, 1969, probably buried in Lone Tree, but I haven't been able to locate that info.
Let me know how your research is going. Linda