...ankers and business men of Memphis, Tenn. J. Knox Walker had been private secretary of James K. Polk, his uncle, when President of the United States. Marmaduke was the son of a former governor of Missouri . He forever sincerely deplored the unhappy altercation. To a gentleman with whom, as a member of General Hindman's staff, he had been associated, but who was absent at the time of the duel, he sa...