John Brown was a marine in the 56th (Portsmouth) Company when he arrived in Sydney in January 1788 aboard the Scarborough as part of the First Fleet. Brown served in Captain Watkin Tench's Company in the colony and returned to England on the Gorgon in 1791.
* information from Mollie Gillen, The Founders of Australia: A Biographical Dictionary of the First Fleet (1989), p 52
'Brown, John (?–?)', People Australia, National Centre of Biography, Australian National University, https://peopleaustralia.anu.edu.au/biography/brown-john-30415/text37718, accessed 11 May 2025.