This is a snip from page 361 of “History Will Prove Us Right” by Howard Willens:
“Secretary of State Rusk testified that after the assassination “there was very considerable concern in Cuba as to whether they would be held responsible and what the effect of that might be on their own position and their own safety.” Slawson told me recently that some of the confidential sources on which Rusk may have based this assessment were still undisclosed as of December 2011. In the Warren Commission files at the National Archives there is a folder of materials from the CIA. Under a cover sheet identifying certain transcripts of the intercepted calls from the Russian and Cuban embassies in Mexico City, the folder contains the transcripts that the commission had seen and relied upon. Next in the folder there is a cover sheet entitled “Transcript of telephone calls between two high officials of the Cuban Government.” Under the cover sheet, there is no transcript. Whether these telephone calls related to Cuba’s reaction to the assassination or some other matter remains unknown in the absence of the transcript. Whatever agency concluded that these transcripts remain classified should have been more careful and removed the cover sheet from the folder as well.65”
Does anyone know whether or not the missing transcripts have been declassified since Howard wrote his book?
Charles: Way late on this but here's what I have. I vaguely remembered the account below from Russo's book but couldn't find it. I believe Willens is referring to an intercepted telephone call between the Cuban Ambassador to Mexico, Joaquin Armas, and the Cuban President, Osvaldo Dorticos Dorrado after the assassination where they discussed the matter, e.g,. Oswald's visit to the Consulate, et cetera.
This is from Russo's "Live by the Sword": "In a flurry of calls, all tapped by the CIA, Cuban President Osvaldo Dorticos phoned his representative in Mexico City, Ambassador Joaquin Hernandez Armas, and wanted to know what Duran had told the police. 'Had the police threatened her so that she would make a statement that the Consulate gave money to that man- the American?' The Cuban President repeated the question numerous times, just to make sure Hernandez understood. Hernandez said he debriefed Duran and the answer was no."
The transcript, if this is what Willens' is referring to, is here:
https://www.maryferrell.org/showDoc.html?docId=2167#relPageId=1&search=Dorticos