Biography
John Harderson was a Jehovah's Witnesses conscientious objector from Montana imprisoned during World War I. Court-martialed for refusing military service, he was held at Alcatraz. (Documented in the Swarthmore College Peace Collection's World War I Conscientious Objectors database.) Archival note: put in solitary confinement (probably at Alcatraz) at least 3 times
Case
United States Disciplinary Barracks, Alcatraz