Fitzhardinge-Seton, Peter C. "Fitzhardinge, William George Augustus (1810–1884)". Australian Dictionary of Biography online. Retrieved 25 April 2012. W.G.A. Fitzhardinge had nine sons, five of them NSW lawyers. He was a descendant of the Earls of Berkeley and of Earl Fitzhardinge.
"Deaths: Fitzhardinge". Sydney Morning Herald. 23 February 1932. Retrieved 24 April 2012.
The opening of memorial gates at Knox Grammar in memory of her son, Brian is the only known occasion on which Mrs Fitzhardinge's photo appeared in the press: Sydney Morning Herald, 16 June 1993, p.14, retrieved from Trove 7 April 2012.
Paul Davis, November 2010, Kuring-Gai Potential Heritage Conservation Areas North Review"HCA 23 – Warrawee" retrieved 16 April 2012.
sl.nsw.gov.au
Johnson, John. "North Shore Houses"(PDF). State Library of NSW, compiled for the Upper North Shore Architects' Network and the Institute of Architects. Retrieved 25 April 2012. See especially p. 27.