cladding and concrete contrasted against the irregularities of regional sandstone. Although his practice was occasionally involved in commercial commissions, his greatest accomplishments lie in the adaptation of the principles and materials of European modernism for site-specific suburban Australian houses. He helped to pioneer free-plan concepts, site-adjusted residential design, the "scientific kitchen", flat roof treatments and the functional placement of windows and doors to create a distinctly regional variation of European modernism. In his development of a Sydney basin form of regional modernism, he is a precursor to the much-debated "Sydney School" of residential architecture of the later 20th century. Internal disputes forced the dissolution of the Baldwinson, Booth and Peters partnership and Baldwinson immediately formed a new partnership with recent Sydney University graduate Geoffrey Twibill. The partnership lasted until late 1959. In 1960, Baldwinson closed his formal practice but continued to accept private commissions in the Sydney suburbs, designing the Hauslaib House, Point Piper (1960), the Pennington House, Whale Beach (1960), the Robinson House, Castle Cove (1963) and his last completed house for the artist Desiderius Orban, in Northwood (1968). The last years of Baldwinson's life were devoted to teaching and travelling. Baldwinson died of myocardial infarction on 25 August 1969 in Royal North Shore Hospital. MARS In 1939 Baldwinson became a founding member of the Modern Architectural Research Society (MARS) which was disbanded late in 1943 when most of its members were away on war service. MARS Group, was a British architectural think tank founded in 1933 by several prominent architects and architectural critics of the time involved in the British modernist movement. The quiet, unassuming modesty which had so endeared Arthur Baldwinson to his friends may help to explain why his achievement was relatively unrecognized in his lifetime.(Bogle, M, 2011, MARS) Gallery References Further reading Victorian Modern – Robin Boyd Robin Boyd Foundation The Australian Ugliness – Robin Boyd Robin Boyd Foundation Beaufort House, Register of Significant Twentieth Century Architecture Heritage list Thesis on Arthur Baldwinson by Michael Bogle, 2008 RMIT Research Repository Apperly, Richard and Peter Reynolds. (1993) "Arthur Norman Baldwinson". Australian Dictionary of Biography. 1940–1980. Melbourne University Press, Melbourne. Arthur Baldwinson papers. Mitchell Library, State Library of NSW. PXD 356 (includes Architectural & technical drawings, 2,686 architectural plans and private papers.) Baldwinson, Arthur. 'My Aesthetics', Address to the Society of Sculptors and Associates, 9 May 1952, Baldwinson Papers, Mitchell Library, State Library of NSW. 'The Beaufort