Cryptonym: HTLINGUAL
ARRB Final Report p.83: Final Report of the Assassinations Records Review Board
"HTLINGUAL is the crypt for CIA's mail opening and mail cover program for 1952 to 1973. The CIA reported to the Review Board that it destroyed most of its formal HTLINGUAL records in 1990 at the direction of CIA's Office of General Counsel."
The Church Committee's overview of four CIA mail opening programs which "resulted in the opening and photographing of nearly a quarter of a million items of correspondence..."
Church Committee Vol 4 p.206: Church Committee: Volume 4 - Hearings on Mail Opening
The Church Committee published an entire report volume on mail opening programs conducted by FBI and CIA.
Memo re: Priscilla Johnson mail intercepts: HTLINGUAL MAIL INTERCEPTS
Priscilla Johnson, who wrote about Oswald after his defection to the Soviet Union, and later wrote Marina and Lee, was herself the target of the HTLINGUAL program.
HTLINGUAL Soft File: Reel 44, Folder D - HTLINGUAL SOFT FILE
This entire file is about Lee and Marina Oswald and their various family, friends, and acquaintances.
104-10303-10002: SHACKLEY EXTRACTS: MEMORANDUM AND NOTE
"(Theodore Shackley) has been briefed regarding Project HTLINGUAL a sensitive project conducted jointly by the CI Staff and DDS/IOS."