Remembered today mainly in connection with a discredited theory of heredity, the "inheritance of acquired traits," but Charles Darwin and others acknowledged him as an early proponent of ideas about evolution. ALS in French, one page, 8 x 10, no date. Letter to an associate requesting several books be sent to him. In fine condition, with several pencil marks, including circle around signature, light edge wear and toning and a bit of paper loss to left edge. RRAuction COA.