United States Penitentiary, Alcatraz Island, California

found: LC data base, 7-8-85(hdg.: United States Penitentiary, Alcatraz Island, California; MLC hdg.: Military Prison at Alcatraz Island, California [previous name]) LC manual auth cd. (called a military prison previous to 1915 when name chgd to U.S. Disciplinary Barracks, Alcatraz Island, Cal. [no publs. in LC data base]; became federal prison July 1, 1934)

found: Hurley, D.J. Alcatraz Island, c1987:p. 139 (Alcatraz Island Federal Penitentiary (1934-1963))

found: National Park Service website, viewed February 21, 2023:(1907: Alcatraz Island ceases to be known as Fort Alcatraz; is designated the Pacific Branch of the United States Military Prison. 1915: Facilities renamed; U.S. Disciplinary Barracks, Alcatraz Island. 1934: Alcatraz Island officially designated a Federal Civil Penitentiary following War Department's determination that it was no longer needed for defense purposes) - http://npshistory.com/publications/alca/index.htm

found: Alcatraz kid, 2018:page 138 (the Pacific Branch of the United States Disciplinary Barracks is located on Alcatraz Island in San Francisco Bay)