G'day David,
I assume you have ordered his file from the National Archives
http://www.naa.gov.au/. There is also a file at the AWM, I call them the Bean files as Charles Bean corresponded with the men or their relatives when he was writing the official histories.
I have some material on him as I have gathered tid-bits on all of the Aussies that served with the RNAS, RFC & RAF with the aim to write a trilogy of books, PM me if you would like to know what little I have on him.
Regards,
Andrew