Charles W. Duncan (1887–1970) was an American avant-garde painter in the circle of artists that gathered around the photographer and art promoter Alfred Stieglitz. He is now known primarily as the subject of one of Charles Demuth’s famous poster portraits. (https://en.wikipedia.org/wiki/Charles_Duncan_(artist)) "Made in honor of such friends as Marsden Hartley, Georgia O’Keeffe, Wallace Stevens, and Eugene O’Neill, these paintings, watercolors, and drawings used objects and wordplay to convey the life, rather than the likeness, of the sitters." (http://artgallery.yale.edu/publication/charles-demuth-poster-portraits-1923-1929)