These files include letters to and from Sobukwe (various subjects) and letters about him, concerning visits, studies, gifts and the welfare of his family during his detention on Robben Island. Many letters are photocopies or typed transcripts of the originals in file Bb.

Other correspondents include: Officer Commanding the prison, Minister of Justice,n(John Vorster, PC Pelser, J Kruger) Chief Magistrate of Cape Town, Robert Bilheimer (Minister in the Presbyterian Church), Gwendoline Carter, Bessie Head, Moira Henderson, Peter Hjul, Nana Mohomo, Vernon McKay, Marvin Miracle (USA), Sally Mittag, (Defence and Aid Fund), Anne Pogrund, Veronica Sobukwe and the children, Eulalie Stott, Helen Suzman, Charlotte Taylor, ML Tracey, Frank Untermeyer (USA), Marvin Wachman (USA), Barney Zackon (attorney).