'Jock' Easton, Bulawayo: personal; politics; reminiscences; Rhodesia Railways, employment, management, pensioners, and finances; emigration;, Bulawayo by-election and opposition to the Rhodesian Front (1967); opposition politics (23 May 1968); judicial resignations and Privy Council appeals (23 Aug 1968); South African election; Roy Welensky's visit to Malawi (1970), Feb 1967-Dec 1970