Complex sentence: Under the command of Master John Nichol, she departed Portsmouth on 27 March 1791, with 160 male convicts as part of the third fleet and arrived on 21 August 1791 in Port Jackson, New South Wales.
Split into simpler sentences: Under the command of Master John Nichol as part of the third fleet to transport convicts to Australia. She departed Portsmouth on 27 March 1791, and arrived on 21 August 1791 in Port Jackson, New South Wales.