A by-election was held for the New South Wales Legislative Assembly seat of Vaucluse on Saturday, 24 August 1957.[1] It was triggered by the resignation of the former Leader of the New South Wales Liberal Party, Lt.Col. Murray Robson, who retired from parliament.[2]
The seat was subsequently won by Brigadier Geoffrey Cox of the Liberal Party. Vaucluse being a blue-ribbon Liberal seat, the Labor Party chose not to field a candidate. The Liberals witnessed a drop in their primary vote due to several Independent Liberal candidates splitting the strong conservative vote.[1]
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