As the Colonel of the 21st Mississippi Infantry, Humphrieys led his regiment in most of the early battles the Army of Northern Virginia participated in. At Gettysburg, he found himself leading Barksdale brigade after Barksdale was killed. He was promoted to Brigadier General on August 12, 1863. His brigade fought under General Longstreet in Georgia and Tennessee and was under General Early in the Shenandoah Valley campaign in 1864. He was wounded at Berryville in Sept. 1864. Humphreys was the first elected Governor of Mississippi after the war. He was inaugurated on October 16, 1865, after receiving a pardon from President Andrew Johnson. He was ejected from office in 1868 after the President's reconstruction plan collapsedunder fire from the Radicals in Congress.
General Humphreys is in civilian attire. There is no backmark on the image but "Jno. J. Hood - Meridian Miss" is written in period ink on the back of the image. John J. Hood was the owner of the photographic album this image came out of. John J. Hood was a Major in the 13th Mississippi Infantry.