The King Battery is a former major gold treatment plant dating from 1902, and established by the English Hampton Plains Group, who had been given a huge land grant South and South East of Kalgoorlie, complete with all mineral rights, in 1889.
The Hampton Lands & Railways Syndicate purchased 216,000 acres outright (freehold), of the Hampton Plains leasehold area, and had an option at that time to purchase a further 1,124,000 acres at a cost of 2 shillings and sixpence (25c) per acre, of the leasehold area.
The British directors of the wealthy Hampton Plains group were crafty enough to insert a clause into their agreement, that "No Crown Grant for lands purchased under this agreement shall contain any (W.A. Govt) reservation of mines of gold, silver, or other precious metals".
This then gave the Hampton Group the pastoral, farming and total mining rights, to a huge area of the W.A. Goldfields, which exclusive rights extend well into the present day via the successors of the Hampton Plains Group.
The Hampton Plain Group was notable for restricting mining access by prospectors and other mining companies, to the Hampton Plains areas, for over 100 years.
The Group established the Hampton Gold Mining Areas in 1920, upon the realisation that their land was quite prospective for gold and other minerals, and the HGMA involved itself in numerous mining projects on its land, both via tribute and joint venture arrangements, and by its own mining operations, over the rest of the decades of the 20th century.
One Dr Sandra Close, a mining expert, has written a very good article about the King Battery, and the link is below;
https://ausimm.com/wp-content/uploads/2018/10/King-Battery-Paper-Sandra-Close-Feb-2019.pdf
Here is a link (below) to another enlightening article, as regards the history of the King Battery, and the Hampton Plains Group;
http://www.mininghistory.asn.au/wp-content/uploads/11.-McGill.Article-11.2004..pdf
And finally, below is the link to the Hampton Plains Syndicate land purchase agreement, from 1889;
https://trove.nla.gov.au/newspaper/article/32727710