On the eve of the trip of American Secretary of State George Shultz to Brazil, the American officer responsible for the Brazilian desk at the Department of State conveys to the Argentine Embassy in Washington that the United States would appreciate an initiative toward the implementation of a system of mutual inspections or a joint declaration in which both countries would renounce the development of a nuclear device, the same two points proposed by American Congressman Paul Finley in 1977.

A message from the Mexican Foreign Ministry to its Embassy stressing that is aware of the Brazilian government’s various proposals to intervene in the resolution of the Cuban-North American problem.

Ruiz Solar discusses in a telegram U Thant's proposal regarding the Cuban crisis. Thant’s proposal mainly consists in establishing permanent inspection in Cuba by representatives of neutral countries chosen by the Cuban Government.

Ruiz Solar discusses in a telegram his opinions on the failed attempts of "Brazilian mediation" of the Cuban crisis.

A telegram from Ruiz Solar (diplomat) describing Brazil and Chile's foreign relations with Cuba in regards to U.S.-Cuban tensions. It covers discussions in the United Nations on the subject and also the "Brazilian mediation" attempt to demilitarize Cuba.