Hello,
I am assuming that you do not know that this man died in Victoria, and a Victorian death cert. will give you the information that you want - has provision for place of marriage, names and ages of all children, name of spouse, years in the state plus other states of Australia.
Victoria BDM
Ernest Hauswell Bennett d. 1939, parents Frederick Jabos Bennett and Ellen Short
The death cert. would cost you $17.50, downloadable to view at
https://online.justice.vic.gov.au/bdm/index-earch?action=getHistIdxSearchCriteria.
Wife Elizabeth d. in 1956, so she would have given the information for the death cert. - best source.
I don't know if you have any of this -
BDM NSW
Mercia Elizabeth Bennett d. 1964 St Leonards, Sydney parents Alfred Ernest and Elizabeth Mary.
Cora Kaye d. at St Leonards and she was Cora Bennet m. Clarence O Kaye 1922, Sydney. Her parents are Ernest Hauswell and Elizabeth Ann.
Ernest is mentioned in the Melbourne Argus newspaper 1929, a fishmonger opening a herbalist shop so you might find him in the Melbourne Post Office Directory.
Wivenhoe.