Myles Dunphy lived in Oatley, a southern suburb of Sydney, and started his wilderness publicity work in 1910. He compiled detailed maps of a number of areas of conservation interest in New South Wales. His original maps of the Blue Mountains, in particular the Coxs River and Kowmung River catchments, featured imaginative and original naming systems. Throughout his life he campaigned for wilderness areas throughout New South Wales.
His interest in bushwalking led to the foundation of the Mountain Trails Club of New South Wales, and was influential in the formation of the Sydney Bushwalkers and the Confederation of Bushwalking Clubs in 1932. He also formed the National Parks and Primitive Areas Council, and took steps to establish a professional parks service.
Milo Kanangra Dunphy AM (1928-1996), the son of Myles Dunphy, was an Australian conservationist best known for the reinvigoration of the Australian Conservation Foundation and his political activism to preserve wilderness areas in New South Wales.