Although best known as one of the greatest syndicated cartoonists of the 20th Century, Dennis the Menace creator Henry "Hank" Ketcham also spent nearly a decade as a gag cartoonist for major New York magazines like Colliers and the Saturday Evening Post. In these gag cartoons, which were primarily published between 1942 and 1950, one can already see the endearing troublemaker that would become the protagonist in his long-running strip. (In fact, Ketcham reused some of the gags and images almost verbatim in his Dennis the Menace cartoons.) Collected for the first time are hundreds of Ketcham's long forgotten magazine cartoons. Together, they provide a rare glimpse into what would later become one the most beloved comics to grace the comics pages.