I smell snake oil.
The article references the work of Frederic Slater.
https://en.wikipedia.org/wiki/Frederic_Slater
Frederic Slater (c1880- 10 March 1947[1]) was an Australian journalist, researcher and "authority on aboriginal folk lore".
In the 1930s, Slater was President of the Australian Archaeological and Education Research Society, also known as the Australian Archaeological Society. He married Katherine Elizabeth Slater who survived him and was executor of his will.
Slater studied Aboriginal place names and archaeological sites and provided information on Aboriginal languages including, for example, the meaning of Canberra and Queanbeyan. However, his best known contribution, which has been described as pseudoarchaeology, is the claim that Australian Aborigianes came from Egypt, based on carvings at Devil's Rock, Wollombi, in the Royal National Park, Brunswick Heads, and other locations. In an address at Sydney, to the Anthropological Society of New South Wales. he claimed the carvings were especially significant ...totems, symbols and ideographs, which show that the ancestors of original Australians migrated from Egypt in the late paleolithic and the neolithic ages.
Slater's observations and theories have been revived in recent years by other pseudoarchaeologists such as Steven Strong.
The Herald Sun "article" (I use the term loosely!) seems to be a re-hash of this bit of this bit of self-published "new archaeology" by Steven and Evan Strong:
http://forgottenorigin.com/5-austral...slaters-legacy
Investigative Journalism at its finest!
</sarcasm>