This is the story of a search for information about a Civil War painting unique in several respects: it is on an old-fashioned roll-down window blind, is the only known surviving work of previously unknown soldier artist John H. G. Hood, and is the only known one of a Union soldier in a Confederate uniform. The man on horseback in the painting, James A. Hensal, was a dashing figure who during the war was sentenced to death by court-martial after shooting and killing his superior officer. For reasons having to do with his exploits, Hensal's execution was never carried out and he later rose to...