1092647 Leonardo da Vinci (engraving) by American School, (19th century); Private Collection; (add.info.: Leonardo da Vinci, from a drawing in red chalk by himself, in the Royal Library, Turin. Illustration for A History of Art for Beginners and Students by Clara Erskine Clement (Frederick A Stokes, 1887). Digitally cleaned image.); 穢 Look and Learn; American, out of copyright.