Elizabeth Stead reminds me a little of the late English writer Mary Wesley, at least from a publishing perspective: both wrote for many years before publishing their first novels late in life - with Stead she was in her early 60s when The Fishcastle appeared. I guess having Christina Stead as an aunt wasn't as much of a help as that relationship might first suggest.
Ian Barry interviews the author for "The Courier-Mail" on the occasion of the publication of her fourth novel, The Gospel of Gods and Crocodiles.