Walter S. Rogers was the primary illustrator used by the Stratemeyer Syndicate for most of its series from the 1910s-1930s. He contributed illustrations in part or full for The Bobbsey Twins, Hardy Boys (Vol. 1-10), Tom Swift, Bunny Brown and His Sister Sue, Six Little Bunkers, Ted Scott Flying Stories, Motion Picture Chums, Motion Picture Boys, Motion Picture Girls, Outdoor Girls, X Bar X Boys, and others.
(source: wikipedia)