Teacher and humanitarian (1821–1912) best known for organizing the relief organization the American Red Cross. Fountain pen signature, “Clara Barton, S.S. State of Texas, Key West,” on an off-white 4.5 x 2.5 card. Matted with the original mailing envelope (postmarked May 7, 1898), four book photos, and an enameled Red Cross pin, to an overall size of 16 x 12. In fine condition. RRAuction COA.