Pseudonym: Boysen, Henry
104-10241-10184: PHOTOS OF MANUEL ARTIME BUESA ALONE AND WITH MARTIN FERRER AND HENRY BOYSEN
07/04/63, CIA document: Text under the photograph at the bottom of the document reads: "Left: Manuel Artime Buesa. Right: Henry Hecksher as Henry Boysen, Bethesda, Md." The photograph was probably on July 4, 1963 along with the other photographs.
104-10241-10101: MEMO: TELEPHONE CONVERSATION BETWEEN AMBIDDY-1 AND R. HERNANDEZ
12/24/63, Memo for the record from Raul Hernandez: ..."2. A-1 advised that he had undergone a thorough physical examination by Dr. Boyd, recommended to A-1 by Mr. Boysen (Henry Hecksher)..."
Larry Hancock, Nexus: The CIA and Political Assassination (2012), p. 62
..."Henry Hecksher (alias Nelson L. Raynock, Henry Boyson..."