Garrick was elected to the
Legislative Assembly of Queensland (lower house) for the
1867–68 period, representing the
East Moreton electorate. In November 1869, he was then appointed to the
Queensland Legislative Council (upper house). He went to London soon after, though, and his seat was declared vacant in December 1870 after him missing two sessions. He was appointed
Attorney-General in the
Douglas ministry for a short period before the premiership went to
Thomas McIlwraith in January 1879. He was an important member of the opposition led by
Samuel Griffith. When
Griffith took over the premiership in 1883, Garrick was appointed colonial treasurer for a brief period, before taking on the role as postmaster-general, a role that he held until 24 June 1884. Garrick was also appointed again to the
Legislative Council, a role that he held from Nov 1883 to August 1894, but for most of the time he was actually in London. In June 1884, Garrick was appointed as the 5th agent-general for immigration in London. He held this post, with some interruption from 1888 to 1890, until 1895. He was successful of sending many immigrants to Queensland; in his first term, he averaged 10,000 per year. ==Later life and commemoration==