Ralph Brough was a private marine in the 5th (Portsmouth) Company when he arrived in Sydney in January 1788 aboard the Alexander as part of the First Fleet. He served in Captain Watkin Tench's Company as an 'ordinary carpenter' until sent to Norfolk Island on the Supply in June 1789. On 14 June 1791 he was demoted from corporal to private for giving spirits to Ann Dutton and Mary Shepherd. He enlisted in the NSW Corps in April 1792 and left Norfolk Island on the Daedalus for Port Jackson in November 1794. No later record has been found for Brough. It is likely that he left the colony.
* information from Mollie Gillen, The Founders of Australia: A Biographical Dictionary of the First Fleet (1989), p 50
'Brough, Ralph (?–?)', People Australia, National Centre of Biography, Australian National University, https://peopleaustralia.anu.edu.au/biography/brough-ralph-30410/text37712, accessed 27 July 2024.