Red Jack was inspired by a reminiscence of Mary Durack's father, who, while travelling by Cobb and Co coach, met the mysterious woman known as Red Jack when she was collecting her mail in Camooweal. He said that after exchanging salutations she went on her way. She was well know on the stations in that area as an expert stockwoman, and very handy with a whip. However, no one know anything about her private life and she seemed to spend most of her time alone with her horse.
Dame Mary Durack was an Australian author and historian. The Durack family were pioneers in the settlement of Australia by Europeans. The story of her family's history, beginning with the mid-19th century migration from Ireland, is presented by Durack in Kings in Grass Castles, and its sequel, Sons in the Saddle.
Durack married the aviator, Captain Horrie C. Miller, and had two sons and four daughters. She was appointed a Dame Commander of the Order of the British Empire (DBE) in 1977 for her services to literature.