Highest-ranking Confederate general (1798–1876) during the Civil War. ALS signed “S. Cooper,” one page, lightly-lined, 4.5 x 7.25, near Alexandria, Virginia, July 20, 1873. Letter to a gentleman. In part: “I received yesterday your communication…In reply I beg to tender to you my respects.” Professionally inlaid into a slightly larger off-white sheet. In fine condition. Accompanied by an unsigned original carte-de-visite portrait of Cooper. RR Auction COA.