This collection is the voluminous CIA "201" file (also known as a "personality" file) on Lee Henry (sic) Oswald. The file was opened in December 1960 and contains a small set of pre-assassination records. After the assassination, this file became a repository for much of the CIA's investigative work, and grew into the massive file available here. Portions of the 201 file were obtained at different times, so documents in some volumes feature RIF header sheets, and documents in volumes obtained earlier do not.