982187 Portrait of Leonhard Euler (engraving) by French School, (19th century); Private Collection; (add.info.: Leonhard Euler, Swiss mathematician and physicist, from a picture by A. Lorgnal in the collection of the instiutute of France. Engraved by B. Holl. Under the Superintendance of the Society for the Diffusion of Useful Knowledge.); Look and Learn / Valerie Jackson Harris Collection; French, out of copyright.