Margarita Paksa (1933) is an Argentine multimedia artist who was born and lives in Buenos Aires where she creates works of a conceptual approach. Ever since the 1960s she has been involved in projects that blur the boundaries between art and politics, such as the work-of-art/event Tucumán Arde [Tucumán Is Burning] (1968). Graciela Carnevale (1942) is an artist born in Marcos Juárez, Provincia de Santa Fe, who was also involved in Tucumán Arde and is currently engaged in organizing the extensive file on those very activities carried out in Rosario and in Buenos Aires. This letter reveals the circulation of the invitation to the Tribute to Che Guevara, which was organized in accordance with one of the decisions of the Declaración de los Artistas Plásticos [Visual Artists’ Statement]. This statement, formulated at the conference held in Havana, Cuba, in May 1972, was produced at the Primer Encuentro de Plástica Latinoamericana [First Gathering of Latin American Visual Artists]. Artists in attendance represented ten countries: Cuba, Chile, Argentina, Brazil, Colombia, Mexico, Panama, Peru, Uruguay, and Venezuela, and their delegates were all prepared to do battle with imperialist domination. The document has some handwritten notes that refer to the plan to communicate with other artists on whom there was insufficient information. To this end, the text outlines the network that the artists were establishing and that would be used to distribute the various communiqués.