He also worked on clearing a road and constructing a telegraph line to Southern Cross, and drove horse-drawn coaches in the Eastern Goldfields from 1892 to 1897.
[1][3][4] George Throssell died on 30 August 1910, necessitating a by-election for the East Province of the Western Australian Legislative Council.
[5]: 19 [7] The election occurred on 26 September 1910,[1] and Marwick won, receiving 714 primary votes comparted to Colebatch's 537 and Morrell's 341.
[5]: 21 [8] The only other candidate was Thomas Brimage, a former Liberal politician who had joined the Labor Party a year earlier.
[5]: 25 [9] On 6 June 1894, Marwick married Susannah Collins at St Patrick's Catholic Church, York.
[1][10] They had four daughters and three sons,[1] including Thomas Marwick, who became a member of the Parliament of Australia in the Senate and the House of Representatives.