American illustrator and caricaturist William Wallace Denslow is best known for illustrating Frank Baum's The Wonderful World of Oz. Prior to that, however, he also worked with the Roycrofters in East Aurora, New York providing cartoons ranging from humor to social commentary. Denslow’s trademark signature included a stylized rendering of a seahorse. Elbert Hubbard, founder of the Roycrofters, was fond of the design and used it often, eventually adapting it to many Roycroft logos, including the cover of The Philistine magazine itself, paper watermarks for many Roycroft books, and, more sparingly, andirons and door knockers.