After Gil Kane and Murphy Anderson. Brush, pen, and ink on a DETECTIVE COMICS #140 blank cover. THE RIDDLER will make a terrific addition to your collection! Check my other listings for more of my cartoon original art, art prints and collectables from my Pop Culture collection! PATRICK OWSLEY has created cartoon art for DC Comics, Hanna-Barbera, Warner Bros. (Looney Tunes), Classic Media Underdog, Bullwinkle, Rankin/Bass’ Frosty the Snowman, Jackson 5 and Mr.