On 18 December 1791 the "Gorgon" left Port Jackson, taking home part of the marine contingent, sent by the First Fleet to guard the convicts, including Watkin Tench, Robert Ross, William Dawes, and Ralph Clark.
On 18 December 1791 the "Gorgon" left Port Jackson, taking home the last company of the New South Wales Marine Corps, which had accompanied the First Fleet to guard the convicts. The marines leaving included Watkin Tench, Robert Ross, William Dawes, and Ralph Clark.