Two weeks after Abraham Lincoln's assassination, recently inaugurated President Andrew Johnson appointed John Frederick Hartranft to command the military prison at the Washington Arsenal, where the U. S. Government had just incarcerated the seven men and one woman accused of complicity in the assassination. From that day through the execution of four of the accomplices, the Pennsylvania-born Hartranft was responsible for keeping the most notorious prisoners in American history. A strict adherent to protocol, Hartranft kept a meticulously detailed account of his experiences in the form of a letterbook. In partnership with the National Archives, noted Lincoln scholars Edward Steers, Jr. and Harold Holzer present this fascinating historical record for the first time, replete with contextual materials and expert annotations. The Lincoln Assassination Conspirators provides a remarkable glimpse behind the scenes of the assassination's aftermath.