Departement Publieke WerkenPublieke Werke Dept.Wierda, Sytze Wopkes, 1839-19112014-08-262014-08-261897-06-242014-08-26http://hdl.handle.net/2263/41614Digitised version of National Archive file S.3/1107. Sketch plan of "Wachtkantoor" (Guardhouse), Johannesburg, signed by "Hoofdopsichter"Sketch planPDF, JPEGNational Archives; Digital rights: University of PretoriaGuard houseJohannesburgPlan or blueprint