Celebrated French novelist (1821–1880) best known for his classics Madame Bovary, Salammbô, and A Sentimental Education. ALS in French signed “G. Flaubert,” one page, 5.25 x 8.25, “Saturday,” no date. An untranslated letter mentioning “Chennevier” and “Guillaume.” A pencil notation on the blank integral leaf dates the letter to May 20, 1872. Intersecting mailing folds (away from signature) and a small early dealer’s ink stamp at lower left, otherwise fine, clean condition. R&R COA.