1 Labor MHA for Bass, Claude Barnard, died on 6 December 1957. A recount on 23 December 1957 resulted in the election of former Labor MHA John Madden.
2 Labor MHA for Denison and Premier, Robert Cosgrove, resigned due to ill health on 25 August 1958. A recount on 4 September 1958 resulted in the election of Labor candidate Eric Howroyd.
3 Liberal MHA for Wilmot, Charles Best, resigned to contest the Council seat of Meander in November 1958. A recount on 24 November 1958 resulted in the election of former Liberal MHA Amelia Best.
4 Labor MHA for Wilmot, Reg Fisher, died on 29 December 1958. A recount on 15 January 1959 resulted in the election of former Labor candidate William McNeil.
5 Labor MHA for Denison, Alfred White, was appointed to the role of Agent-General in London in January 1959. A recount on 27 January 1959 resulted in the election of Labor candidate Bert Lacey. Lacey never got to sit in Parliament, however, as the House had been prorogued and he was defeated at the following election.
6 On 9 April 1959, Dr Reg Turnbull, the Treasurer and Minister for Health, was suspended from Labor Party membership by the State Executive due mainly to constant criticism of the Reece Government. The event precipitated the calling of the 1959 election for 2 May, at which Turnbull won two quotas (27.93%) in his own right.
Sources
Hughes, Colin A.; Graham, B. D. (1976). Voting for the South Australian, Western Australian and Tasmanian Lower Houses, 1890-1964. Canberra: Australian National University. ISBN0-7081-1334-6.