Departement Publieke WerkenPublieke Werke Dept.Wierda, Sytze Wopkes, 1839-19112014-08-262014-08-261897-02-192014-08-26http://hdl.handle.net/2263/41733Digitised version of National Archive file S.3/614. Sketch plan of the Potchefstroom prison, signed by "S.W. Wierda. Hoofd van Publ.Werken"Sketch planPDF, JPEGNational Archives; Digital rights: University of PretoriaPrisonPotchefstroomPlan or blueprint