Pseudonym: Cosme, Doctor
104-10271-10254: CABLE: IF EITHER CHIBAS OR ESTEVEZ IS APPROACHED BY KUBARKER PERSON MAKING
09/06/60: Cable from Havana to Director: Slugline RYBAT JMNET: RE HAVA 6009 (IN 47422): "If either Chibas or Estevez is approached by KUBARKER (CIA) person making approach should use name of Mr. Marshall (William Murray) and should say that he is making contact at the suggestion of Dr. Cosme in Havana. This will establish bona fides as Ray has sent word to both Chibas and Estevez that contact may be made in this fashion. Cosme is pseudonym selected for Ray exclusively for purposes of this contact. He is not generally known by this pseudonym. C/S Comment: HAVA gave details re drop zone and list of weapons, etc. requested."
Undated HSCA document by Betsy Palmer: Page 2: ..."COSME - pseudonym for Ray for 1 contact only..."