Clair I wonder if Lillian Iris McDOWALL was a relative not Hector Ross's wife....she is not with him in 1954.
Australian Electoral Roll
1931
McDOWALL Donald John 130 Hambleton Street, Middle Park Civil servant
McDOWALL Donald Ross 130 Hambleton Street, Middle Park Salesman
McDOWALL Hector Ross 130 Hambleton Street, Middle Park Sales
McDOWALL Nellie 130 Hambleton Street, Middle Park HD
1936, 1937
McDOWALL Donald Ross 130 Hambleton Street, Middle Park Salesman
McDOWALL Hector Ross 130 Hambleton Street Middle Park Sales
McDOWALL Nellie 130 Hambleton Street, Middle Park HD
Notice to apply for grant of probate for Nellie 1943
http://www.rootschat.com/links/0b41/1949
McDOWALL Hector Ross 130 Hambleton Street, Middle Park Sales
McDOWALL Lillian Iris 130 Hambleton Street, Middle Park Clerk
and
MACE Theresa Annie 130 Hambleton Street, Middle Park Boot trade
1954
McDOWELL Hector Ross 130 Hambleton Street, Middle Park Sales
Unfortunately marriages only extend to 1942 in Vic and Hector names Nellie [?Ellen] NOK when he enlisted in 1942.
http://www.ww2roll.gov.au/script/veteran.asp?ServiceID=A&VeteranID=587582#summary1If Hector served overseas he may have married, if indeed he did marry, in the UK. Perhaps his service file may help you. Facility to purchase a copy online
http://www.naa.gov.au/collection/recordsearch/index.aspxThere is a rather nice two storey terrace house at 130 Hambleton Street, Middle Park.
Springvale Botanical Cemetery
McDOWALL Hector 84 years
Date of death 31 Oct 1989 Date of service 9 Nov 1989
Cremated and the ashes have been collected.
His death notice would give you more details.
Cheers
Cando