STC355104 Hanging of the Lincoln Conspirators, 1865 (b/w photo) by Brady, Mathew (1823-96) & studio; Private Collection; (add.info.: Mary Surratt, Lewis Powell, David Herold, and George Atzedordt were hanged at the Old Arsenal Penitentiary in Washington D.C. on July 7th, having been found guilty of conspiring to assassinate President Abraham Lincoln (1809-65) and other members of the United States government; Mary Surratt was the first women to be executed by the federal government;); The Stapleton Collection; American, out of copyright.