PS
By 1912 the family was living in Whareiti, Strathfield, Sydney.
Douglas Blacklock left for war in 1915, in the AIF. He was killed at Gallipoli in 1916.
In 1916 Ella Blacklock was awarded the prize for a third year nurse trainee at Sydney Hospital, so she was a nurse not a doctor.. She graduated as a trained nurse in December 1916.
In the 1930 to 1937 electoral rolls she was living in Parramatta, Sydney as a nurse.
In 1943 she married Dudley Regan Flannery as his second wife.
Dudley died in 1955.
Ella Flannery was alive in 1972, aged about 82. I don't know when she died.