William Siegel (1905-1990; born Wilhelm Tsiegelnitsky, later William Sanderson) was a 20th-Century American painter and illustrator associated. Early in his career, he worked as a contributing editor publishing illustrations in New Masses magazine. During the Great Depression he developed a successful career illustrating children's books, including Marion Hurd McNeely's Newbery Honor Book The Jumping-Off Place. He also worked in magazine illustration and advertising, before being drafted into the U.S. Army in World War II. He served at Lowry Air Force Base in Denver, before being sent to Germany. After the war he became an Assistant Professor of Advertising Design at the University of Denver, teaching there from 1946 until his retirement in 1972. He was considered "one of the mainstays, on