Edit:
Have found the 99.9% definite marriage and death & obit for the daughter.
And put xxFlyspotxx onto the Ryerson Index website
http://ryersonindex.net/search.phpPretty sure it's definitely the daughter of Oscar & Mary - obit mentions her 2 brothers as named above - plus there were 2 more brothers, 4 in all and all pre-deceased her. Lots of living relatives named.
Also the obit of the daughter's husband (surname is NIDDRIE)
Job done?

- however:
Mods: I think this topic would be best placed on the Aussie boards?
Where xxFlyspotxx might attract the attention of our top-gun Aussie Rootschatter team for better advice on how to find deaths etc in 'off-line' NSW records.
http://www.bdm.nsw.gov.au/cgi-bin/Index/IndexingOrder.cgi/search?event=birthsThe NSW online Index only goes up to 1979 for deaths, 1909 for births, 1959 for marriages.
Cheers
AMBLY