1767-1834. Australian colonist, a pioneer of sheep breeding and vine growing. He quarrelled with successive governors of New South Wales, and, when arrested by William Bligh, stirred up the Rum Rebellion 1808, in which Bligh was himself arrested and deposed. Born in Devon, England, MacArthur went to Sydney in 1790, and began experiments in sheep breeding in 1794, subsequently importing from South Africa the merino strain. In later years he studied viticulture and planted vines from 1817, establishing the first commercial vineyard in Australia.