Denslow illustrated "Denslow's Mother Goose" in 1901, and "Denslow's Night Before Christmas" in 1902. He illustrated the 18-volume "Denslow's Picture Books" series in 1903–04. He drew comic strips with Father Goose, the Scarecrow, and the Tin Woodman as characters. He created the comic strip "Billy Bounce". Billy was one of the first comics characters with superpowers. Denslow bought Buck's Island, Bermuda. He crowned himself King Denslow I. He was married three times and had one son. He died in New York City of pneumonia.