Union major general (1822–1901) who fought at Antietam and Second Bull Run. Porter was court-martialed in 1863 for disobeying an order from Gen. Pope to attack but was exonerated in 1878. Original 2.25 x 4 carte-de-visite photo by an anonymous studio, signed in the lower border in black ink, “F. J. Porter, Brig Genl.” In fine condition, with some light staining along right edge of background. RR Auction COA.