Gordon was the third son, not expected to inherit the estate. Gordon Mainwaring had a problem with alcohol. He drank too much, and after a time in the army in India arrived in South Australia in January 1840, banished there by his family, who paid for him to stay away. He is known in the family as the remittance man. This term meant an emigrant, often sent to a British colony, supported or assisted by payments of money from his family.
The South Australian Register of 17 June 1862 reproduced a lengthy obituary of Gordon's father, Admiral Rowland Mainwaring, first published in the Illustrated London News on 26 April 1862. Gordon's older brothers had died and Gordon, to everyone's surprise, perhaps including his own, was now the heir to the Whitmore estate.
|THE LATE ADMIRAL MAINWARING. (1862, June 17). South Australian Register (Adelaide, SA : 1839 - 1900), p. 3. Retrieved from http://nla.gov.au/nla.news-article50172924|
|"Obituary of Eminent Persons." Illustrated London News [London, England] 26 Apr. 1862: 425. The Illustrated London News Historical Archive, 1842-2003. Retrieved through Gale News Vault via the National Library of Australia|