Standing beside a 50-pounder Dahlgren rifle, on board USS Pawnee in Charleston Harbor, South Carolina, circa 1863-1865. He was then commanding the South Atlantic Blockading Squadron. Identification of the gun is from Warren Ripley: Artillery and Ammunition of the Civil War, page 104. The original negative for this photograph is held by the Library of Congress (their photo # is LC-B8171-3417). U.S. Naval History and Heritage Command Photograph.