1938 Invercargill mayoral by-election  The 1938 Invercargill mayoral by-election was held on 19 October 1938 to elect the Mayor of Invercargill after the death of John Miller on 20 September. Miller had been elected to a fourth consecutive term in May. Ralph Hanan was elected to council in 1935 and became deputy mayor in May 1938. The following table gives the election results: