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'Johnston, George Horatio (1833–1904)', People Australia, National Centre of Biography, Australian National University, https://peopleaustralia.anu.edu.au/biography/johnston-george-horatio-25756/text, accessed 16 January 2021.
6 November 1833
Sydney, New South Wales, Australia
20 December 1904
Stanmore, Sydney, New South Wales, Australia