Just saw this article online, a good read:-
"Macphersons in search of the sister" - The West Australian - 30 August 2017
https://thewest.com.au/business/public-companies/macphersons-in-search-of-the-sister-ng-b88583485z
"...Since making this same revelation at Boorara, Macphersons have been like a dog who just discovered a bone graveyard, spending some $9m on exploration in the last year alone – and the results keep coming...."