Union general and secretary of war (1829–1890) who holds the distinction of being the only Cabinet secretary ever to have been impeached. Choice 2.25 x 4 carte-de-visite bust portrait of Belknap in uniform, signed at the bottom of the image in black ink, “Wm. W. Belknap.” Contemporary notations on the reverse indicate a date of November, 1865. Published by Alexander Gardner. In fine condition. RR Auction COA.