HARPER, Charley, (American, 1922-2007): Frog Serigraph, sight size 15'' x 14.5'', signed lower right, numbered 778/1500 lower left, custom frame and matting, 25'' x 25''. Harper is an American Modernist best known for his nature paintings featuring birds. Because of this subject matter, he was commissioned by organizations like the National Park Services. Charley did posters, prints and illustrated books such as The Golden Book of Biology and magazines.