Born: Established: Melbourne, Victoria, ; Died: Ceased: 20 Mar 2014 Sydney, New South Wales,
O'Hagan was born in Australia and grew up in Canberra. She lived in New Zealand, the South Pacific, the United States and for several decades in Rome. Her interests included literature, painting and architecture.
(Source: Adapted from John Loder, Australian Crime Fiction: A Bibliography 1857-1993 (1994)).