Held in the following prisons: Allandale; Barberton; Baviaanspoort; Bethal; Biendonne; Brandfort, Brandvlei; Cinderella; Colesburg; De Aar; Diepkloof; Douglas; Driehoek; Durban Central; Dwarsrivier; Fort; Geluk; General JC Steyn; Germiston; Goedemoed; Graaff-Reinet; Grahamstown; Groenpunt; Grootvlei; Johannesburg; Heidelberg; Kandaspunt; Kimberley; Kinross; Kleindrakenstein; Klerksdorp; Kroonstad; Krugersdorp; Leslie; Lykop; Leeuwkop; Lichtenburg; Losperfontein; Magaliesoord Rehabilitation Centre for Men; Malmesbury; Modder Bee; Nelspruit; New Heidelberg; Nigel; North End; Obiqua; Pietermaritzburg; Pietersburg; Piet Retief; Point (Durban); Pollsmoor, Potchefstroom; Pretoria Central; Pretoria Local; Rawsonville; Robertson; Rustenburg; St Alban's; Sandvlei; Sasolburg; Sevenfontein; Simondium; Standerton; Trichardt; Upington; Utrecht; Vereeniging; Victor Verster; Voortrekkerhoogte; Vooruitsig; Waterval; Wellington; Westville; Winburg; Witbank; Worcester; Zonderwater (NB: most of these letters concern prison warders brutality, psychological torture, denial of right to appeal, appalling food, short visits, generally terrible conditions and some are anonymous).

The collection consists of personal and political papers and photographs.