Harry F. Oppenheimer, 44 Main Street, Johannesburg, etc.: Rhodesian (Zimbabwean) politics; Roy Welensky's archives; texts of Oppenheimer's lectures at the University of Cambridge ('The Fading Commonwealth') (1967), Rhodes University, Grahamstown (Makhanda) (1970), and the University of Witwatersrand (1979), Feb 1964-Jan 1980