This memorandum is a compendium of comments about the Treaty of Tlatelolco made by different delegations at the UN. It includes statements by the delegates from the United States, Brazil, Ireland, Ethiopia, Austria, Italy, Pakistan, El Salvador, Mauritania, Iraq, Greece, Spain, Tanzania, Zambia, the Netherlands, Argentina, Venezuela, Sierra Leone, Canada, Jordan, Ecuador, Guyana, Colombia, Malta, Panama, Bolivia, Costa Rica, and Peru, in that order.

Alfonso Garcia Robles explained how the Mexican delegation tried to gather the support of the Latin American countries for the NPT draft. These countries prepared and presented modifications to the NPT text, and the United States and the Soviet Union accepted some of these proposals. Garcia Robles reported that the Argentinian and Brazilian representatives said they recognized the value of the NPT but would not support it if it kept its clause prohibiting peaceful nuclear explosions. The Ambassador also reported the Soviet positive reactions toward the Treaty of Tlatelolco. Garcia Robles recounted the skepticism of some delegations toward the NPT. He recommended not to sign the NPT in 1968 unless the Soviet Union signed Protocol II of the Treaty of Tlatelolco, which includes negative security assurances.

An air letter from Mexican Embassy describing Brazil's role as the mediator of the Cuban crisis, the dismantling of Cuban nuclear weapons bases, and the role of the UN in this conflict.

Letter from Mexican Ambassador to the Organization of American States (OAS) to Mexican Foreign Minister describing a recent meeting with Mr. Edward Martin, Assistant Secretary of State for Latin American Affairs and the various Cuba-related items that were discussed.

At the request of the United States, the Council of the Organization of American States met, acting provisionally as Organ of Consultation, in a secret session, with the objective of listening to a speech by U.S. United Nations Ambassador Adlai Stevenson in relation to the issue of Cuba.

At the request of the United States Delegation, the Council of the Organization of American States met this morning, in a “secret” session, acting provisionally as an Organ of Consultation, on the case of Cuba. The object of the meeting was to listen to Mr. Alexis Johnson, Undersecretary of State for Political Affairs, about the latest developments registered in Cuba. The talk was divided into three parts, namely: Presence of Soviet troops on the island; Visit by Prime Minister Fidel Castro to the Soviet Union; and Internal situation in Cuba.

The Mexican ambassador to Czechoslovakia says in this telegram that Czechoslovakia repudiates the United States' blockade of Cuba, declares its support for Cuba, and supports the declaration by the Soviet delegate at the Security Council.

A memorandum about Secretary of State Dean Rusk’s declarations during the meeting with the Latin American Ambassadors at the State Department on Sunday 28 October 1962. Rusk makes two points: the crisis situation in Cuba is not settled and nothing of what the United States says and does will alter its attitude towards the pressing situation in Cuba. At the end of the meeting, Rusk says that “the solidarity of the OAS had been a magnificent contribution to peace and that it had made a deep impression around the entire world, especially in Moscow," constituting an appeal for them to be discreet in their declarations to the press given that the situation facing the world continues being delicate.

A telegram from the Mexican Embassy in Washington, DC describing the US's stance on the situation in Cuba and the opinions of President Kennedy.

A letter from the Mexican Ambassador to accompany the attachments of three examples of reports on the OAS U.S. Resolution from Argentina, Costa Rica, the U.S. and the Dominican Republic. The ambassador also describes a conversation he had with Mr. Ward P. Allen of the North American delegation (and the U.S. State Department).