Nineteenth-century artist Lewis Miller captures the façade of York, Pa.’s, Washington Hall, built in 1849. The building, sometimes referred to as the Independent Order of Odd Fellows or IOOF hall, housed overflow prisoners after the Battle of Gettysburg. Chief Surgeon Henry Palmer had threatened to resign, rather than treat Rebel wounded, according to letter writer Cassandra Small. The hospital and its satellites were military posts, so Washington Hall can be viewed as a prisoner of war camp site.