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FD-302 (Rev. 1-25-60) ( FEDERAL BUREAU OF INVESTIGA N 7 e 26, 1962 Date Warden OLIN G, BLACKWELL, United States Penitentiary, Alcatraz, California, advised that the life preserver which was retrieved by his officers just east of Alcatraz Island in San Francisco Bay was practically identical in make-up and appearance to the other life preservers located in this matter. He believed that this life preserver had been used by one of the Escapees. 6/22/62 Alcatraz, California SF 76-2887 On ___._.______at File # en ~ 0 Wy ae a 5 ay 6/28/62 by Date dictated This document contains neither recommendations nor conc ions of the FBI, It is the property of the FBI and is loaned to your agency; jt and its contents ara not to be distributed de your agency. TS