Don't abandon Democracy, page-96

"This is well documented and to state authorities didn't find heritage important "
That seems inconsistent with the Half-Caste Act, which "was the common name given to Acts of Parliament passed in Victoria (Aboriginal Protection Act 1886) and Western Australia (Aborigines Protection Act 1886) in 1886".
https://en.wikipedia.org/wiki/Half-Caste_Act

I would call that well documented.