The Bulgarian Embassy in Havana reports to the Central Committee of the Bulgarian Communist Party and the Bulgarian Ministry of Foreign Affairs on political, economic, and cultural developments in Cuba circa 1963. Cuba is politically united, but is experiencing economic hardship after the “Caribbean Crisis” primarily because of the US embargo. In the report, embassy staff reviews developments between socialist countries and Cuba throughout 1963. Some examples include communist aid to Cuba after Hurricane Flora and Cuba’s stance on Sino-Soviet relations. Bulgaria’s show of solidarity resulted in concrete political, economic, and cultural cooperation. Embassy staff notes the drawbacks and benefits of Bulgaria’s relationship with Cuba.

Bulgaria’s Ambassador to Cuba Konstantin Michev reports on the reorganization of Cuba’s revolutionary government. In the report Michev notes that the government is realigning itself with the intent to become socialist, though not publicizing it. The realignment includes the creation of ministries and committees to oversee the transition and affairs of the country. Fidel Castro, Raul Castro, and Ernesto Guevara are assigned key posts to manage the transition. Through the help of socialist countries, Cuba is developing independent of USA, which previously hampered Cuba’s growth and development. Michev also notes that the Cuban government is prepared to defend itself against counter-revolution and US intervention into Cuban affairs.

In a secret supplement to information from the VIII Congress of the People's Socialist Party, Bulgarian delegates Abramov and Tellalov summarize answers that Blas Roca, the Cuban delegation head, provided the congress. Roca claimed that socialism is the end goal of the revolution, but it is not publicly discussed. He explained the Communist party's involvement in the revolution and July 26th Movement. Abramov and Tellalov also describe the reestablishment of relations and disagreements between Cuba and Yugoslavia, including discussions about weapons. Fidel Castro met with socialist country representatives and described Cuba's plans to nationalize enterprises, particularly American. During the congress Castro described the evolution of the July 26th Movement and the consolidation of Communism in Cuba. Abramov and Tellalov endorse Castro's leadership and review the Cuban military's strengths and weaknesses. There is a brief mention Sino-Soviet relations.

Paszkowski discusses changes in the tensions of the Cuban Missile Crisis situation, including his opinion that the US's recent actions and rhetoric were a pre-election bluff.

Jelen discusses a call he received from Foreign Minister Raúl Roa [García] regarding President Osvaldo Dorticós' statement to be made during the general debate of the next UN session. He also says that the "Cuban question has gained much attention" and that "currently there was no danger of [US] military aggression against Cuba."

Jelen discusses a conversation he had with [Foreign Minister Raúl] Roa [García] on 9 September. They discussed diplomatic visits, UN delegation sessions, and growing tensions in the 'Cuban situation' and possible US military action against Cuba.

The Italian Communist Party (PCI) Politburo discuss recent events in Cuba: the revolution, US invasion of Cuba and the international political situation.

A meeting between the Politburo members of the East German Central Committee (CC GDR) concerning US imperialist actions against Cuba, meaning the economic sanctions and blockade. The GDR Politburo members express their strong support of Cuba.

Brazil's embassy in Moscow discusses visits by Novotny, Ulbricht and Gomulka to Moscow and says that there is the impression that the recent international events have created a state of disorientation in the community of socialist countries and that the great challenge of Khrushchev will be to accommodate this state of affairs in the short term.

Two department heads of the Cuban general staff (revolutionary education and film departments) spoke with the military attache to the Chinese embassy in Cuba. They discussed morale of the Cuban troops, relations with other socialist countries and the American airplane shot down over Cuba.