Files of the United Nations (UN) Secretary-General, U Thant, include:
Text of a statement by Achkar Marot, the representative of Guinea, to the UN, refers to Nelson Mandela's imprisonment on Robben Island. Response by the South African government to two articles published in the "UN Monthly Chronicle," which discusses the South African government's position on the Rivonia Trial, including Nelson Mandela's statement from the dock. The conclusion and recommendations of the International Seminar on Apartheid, Racial Discrimination and Colonialism in Southern Africa held in Kitwe, Zambia (1967). The conference recommended special campaigns around the incarceration of outstanding leaders such as Nelson Mandela, Walter Sisulu, Robert Sobukwe and Bram Fischer.

Video recorded interview with Nelson Mandela and sound recordings of addresses by Nelson Mandela to the United States Congress and the United Nations General Assembly.