Union general (1825–1864). Colonel of the 23rd Pennsylvania Infantry. He fought as a division commander of General Sickles 3rd Corps at Gettysburg, and took command of the corps after Sickles was seriously wounded. He also served with distinction with the Army of the Potomac in the 1864 Overland campaign; he was stricken with malaria and died on Octobert 18, 1864. Rare original 2.5 x 4 carte-de-visite full-length portrait of Birney in uniform by R. W. Addis of Washington, signed in the lower border in black ink, “D. B. Birney.” In fine condition, with a surface impression to the top and a couple areas of surface loss to reverse. RR Auction COA.