Hough's casualty and service files are not yet scanned on the Australian National archives but the casulaty file title is given as:
HOUGH, William - (Pilot Officer); Service Number - 417081; File type - Casualty - Repatriation; Aircraft - Stirling LJ940; Place - Bourges, France; Date - 15 August 1944
it might be useful to pay for it to be scanned.
http://www.naa.gov.au/collection/rec...rch/index.aspx
Dennis