John Murphy was a biology, chemistry and outdoor education teacher in Adelaide for 20 years. He is still a keen bushwalker in the Victorian Alps where his grandfather, Michael Lawler, had a cattle lease on Mt Hotham. In retirement, John farms a property in the Adelaide Hills. Bill Dowling was brought up in Ballarat, Victoria, but has lived in Adelaide for 50 years. Before retirement, he worked as a builder's labourer, photographer, teacher and bureaucrat. He is now an Adelaide Botanic Gardens guide and participates regularly in Friends of the Great Victoria Desert field trips.