A little more - the reason I searched the inquest index is that R PARK is Royal Park which was formerly known as a Hospital for Mental Hygiene and I have found that many deaths recorded in institutions in Victoria, often have an inquest recorded.
http://en.wikipedia.org/wiki/Royal_Park_HospitalPLANT Bertram W H [This could be a transcription error on the index]
1947 Ref#94
Cause Brights Disease
Inquest Date 14 Jan 1947
There appears to be two marriages for Bertram Wm J.
PLANT Bertram William John Born Northcote
KIDD Florence Jessie Born Fitzroy
1905 Reg#6813
Births to the abovenamed
PLANT Lindsay George
at Prahran 1907 Reg#5511
PLANT Ronald James
At Caulfield 1909 Reg#2003
Marriage
PLANT Bertram William John
BATTEN Gwendoline Anne
1935 Reg#2615
Australian Electoral Records
1914,1919,1924
PLANT Bertram William John 12 Cole Street, Gardenvale Warehouseman
PLANT Florence Jessie 12 Cole Street, Gardenvale HD
1936
PLANT Bertram William John 13 Trevallyn Road, Launceston Agent
PLANT Gwendoline Anne 13 Travellyn Road, Launceston HD
1937, 1942
PLANT Bertram William John 84 Carlisle Street, St Kilda Central Agent
PLANT Gwendoline Anne 84 Carlisle Street, St Kilda Central HD
also detailed by Jenn in previous post
Death which you probably have noting her mother's name
PLANT Florence Jessie
Father Kidd James Swan Mother Edith CANDY
At Armadale 84 years 1966 Reg#9498
I don't see a death for Gwendoline Anne BATTEN but here is her birth
BATTEN Gwendoline Annie
Father Albert BATTEN Mother Ida May BATTEN nee HEATH
26 May 1904
At 28 Stone St Launceston Reg#477
Cheers
Cando