French diplomat and politician (1852–1924), winner of the 1909 Nobel Peace Prize. ALS in French, signed “d'Estournelles,” one page, 4.25 x 5.25, no date, but postmarked February 18, 1899. Untranslated letter to a gentleman in a self-contained air mail envelope. In very good condition, with missing lower left corner and scattered light toning. RRAuction COA.