The 1906 Coolgardie state by-election was a by-election held on 9 July 1906 for the Coolgardie seat in the Western Australian Legislative Assembly. The by-election was triggered after the result of the 1905 state election was declared void by the Supreme Court due to voting irregularities.https://trove.nla.gov.au/newspaper/article/82403000
Background At the 1905 general election, Ministerialist candidate William Trezise Eddy narrowly defeated Labor candidate Charles McDowall by 23 votes. The Supreme Court voided the result in May 1906 after it was shown that 38 votes had been improperly recorded or rejected. Eddy was not officially a member of parliament between 27 April and 9 July 1906.
Results Eddy increased his margin and was re-elected with a 100-vote majority.
Party Candidate Votes % Ministerialist William Trezise Eddy 1,051 52.5 Labor Charles McDowall 951 47.5 Total formal votes 2,002 100 Informal votes 12 0.6 Turnout 2,014 89.7
Aftermath After the result, Mr W. T. Eddy received messages of congratulation from various sources. The Premier Newton Moore described it as a "magnificent victory". Minister of Works Mr Price called it a "plucky win". MLCs Glowrey and Bellingham stated that Coolgardie had done its duty. The writ was returnable on 13 July 1906. Eddy planned to leave for Perth on Monday 16 July and take his seat in the Legislative Assembly the following day.https://trove.nla.gov.au/newspaper/article/218121631
See also Electoral results for the district of Coolgardie
References
William Trezise Eddy – Parliamentary Biographical Register.