- FondsAD1812 - Treason Trial 1956
- SeriesI - Treason Trial Defence Fund
- SubseriesI5 - The Treason Trials Defence Fund with An Account of the Arrest of Some Trialists and Their Imprisonment in the Johannesburg Fort
- sub-subseriesI5.6 - Jack Barnett
- FileI5.6.1 - Correspondence
- FileI5.6.2 - Catalogue for auction