From Wikipedia, the free encyclopedia Henry Wilson "Heck" Allen (September 12, 1912 – October 26, 1991) was an American author and screenwriter. He used several different pseudonyms for his works. His 50+ novels of the American West were published under the pen names Will Henry and Clay Fisher. Allen's screenplays and scripts for animated shorts were credited to Heck Allen and Henry Allen. In 1937 Allen began working as a contract screenwriter for MGM animation division. While his early work w ...