HI,
Following up on the Lynn Baker possibilty,
Several Ellen Bakers died in Qld in the 1950's,
Mary Ellen Baker 1951 father JOhn Keleher mother Susan Campbell
Rosa Ellen Baker 1955 father William Warner anad Lucy Buckingham
Ellen 1955 John Furguson and Mary
Mary Ellen Baker 1959 John Lane and Ellen Hanna
1956 a death of Ellen Annie Lynn Charles James Crump and Ann Allen Davis
So I would say theya re all unlikely candidiates.
The only Ellen Lynn arriving in Qld was in 1888 and she was 39.
Nothing matching in Vic, NSW or WA
Modified to add
NZ has a marriage for Ellen Lynn to Frederick William George Rogers in 1910.
Several NZ deaths for Ellen Rogers in the '50's two wold have birth dates c1888
1951 Ellen Rogers aged 66 and 1955 Ellen Rogers aged 70.from
https://www.bdmhistoricalrecords.dia.govt.nz/search/Robyn