Sorry, I don't know of a "John Shelton" either.
I am trying to find anything about my grandmother, my dad's mother. My dad is Little Carl Shelton. His mother was Lillie Shelton. Her maiden name was Myers, she married a "Biggs" and had a son Edward, born about 1913. She married my grandfather sometime after that and they had Dorothy, Little Earl and Little Carl. Lillie later married Roy Miller. She died Jan. 10, 1967, in Fairfield, Il. Anything about her would be helpful.