Admiral (1813–1891) who helped improve the Navy as the superintendent of the US Naval Academy after significant service in the American Civil War. Partly-printed DS one page, 8 x 13, August 19, 1865. Porter grants a four month leave of absence to an assistant engineer aboard the USS Penguin. Signed at the conclusion by Porter, with two endorsements in other hands near the bottom. Partial fold separations, some feathering to some of the ink, light mirroring of signature and some written text, and a uniform shade of mild toning, otherwise very good condition. RR Auction COA.
