06/00/77, LA Division Work File: "AMTURVY OPERATION: 1. The AMTURVY Operation was designed for the purpose of conducting sabotage operations against Cuba. It consisted of a net of 13 AMTURVY assets whose primary function, apart from sabotage, was the preparation of target studies and analysis of sabotage operations. The files contain only one reference to assassination, that in 1963 and the continuation of the same plan through to 1965. Based on a review of the files, it is apparent that the following assassination plan could have been known to the Cubans, including the overall purpose of the AMTURVY Operation..."
12/09/63: Cable from JMWAVE to Director: Slugline RYBAT TYPIC AMTURVY SAGTEL: REF WAVE 8694 (IN 76046): "Following translation ref. 15. RECD MSG NR. 5. Start sending things via Enrique Vicente Socarras and the (REDACTION) embassy. We expect you to advise when you start pouching things so we can wait for them. Today RECD the magnum pistols but no bullets. Also RECD the radios. Advise the distance over which you can hear then. Send the filters for pistols soon. AMTURVY-1 (Arturo Maria Jesus Varona Alonso)."
12/11/63: Cable from Director to JMWAVE: Slugline TYPIC AMTURVY: "1. Pleased note from Refs A and B that AMTURVY net has gained access Japanese diplomatic pouch thru Enrique Vincente Socorras embassy chauffeur and latter's contact Kamay Saito attaché. Also apparent Socorras has obtained Saito's permission requested Ref A for WAVE to send spare parts thru pouch to Socorras for Ref C..."