Does anyone have any knowledge of the historical work?AZS has...

Does anyone have any knowledge of the historical work?
AZS has released very little information about it:

The places with historical works are up to 4km apart from each other.

All I could find about the Mount Hall Pegmatite was:
Simple columbite-beryl pegmatites. 9.6 kilometres south-east of Roebourne. Suggested GPS co-ordinates are 520,650E 7,698,100N UTM50 AGD84. An aboriginal group mined 106 tonnes of beryl, 8.6 tonnes of tantalite-columbite concentrate, and 1.1 tonnes of cassiterite concentrate here in 1961.The field contains eleven pegmatites, the largest 20 metres long, 4 metres wide, with a steep to vertical dip. The pegmatites are found in Archaean metamorphosed ultramafic rocks and **bro within the Roebourne syncline. They show crude zoning with quartz cores surrounded by layers of quartz, cleavelandite and muscovite. Beryl is found as grey, white and pale green crystals. Some may reach emerald quality.
https://www.mindat.org/loc-248965.html
I would be very grateful for any tips or advice.
Kamprad7