Jefferson Davis
Jefferson Davis, born in 1808, was the most well-known figure of the Civil War as the president of the Confederacy. He also served in the Mexican-American War, was a senator from Mississippi, and was Secretary of War under President Franklin Pierce. In 1861, only a few years before the Confederacy capitulated, this picture was taken.
John Herschel
Sir John Herschel possessed a wide range of skills, from photography to chemistry to astronomy. Aside from these, he also developed the blueprint and popularized the Julian Day calendar, both of which are still in use by astronomers today. His life span was from 1792 to 1871. Julia Margaret Cameron took this photograph in 1867.