[Rockhounds] OT: The 3,700-km long 'Great Hedge of India'

[Paul]

This is off-topic. However, I never heard of this before and
sounded like a case of history that someone felt was better
left forgotten.

The 'Great Hedge of India’
PDF file: 
https://inis.iaea.org/collection/NCLCollectionStore/_Public/47/009/47009689.pdf?r=1
Abstract: https://inis.iaea.org/search/search.aspx?orig_q=RN:47009689

“The 'Great Hedge of India', a 3,700 kilometre-long hedge
installed by the British customs to safeguard the colonial
salt tax system and avoid salt smuggling

Inland Customs Line - https://en.wikipedia.org/wiki/Inland_Customs_Line

The British Once Built a 1,100-Mile Hedge Through the Middle of India
Atlas Obscura
https://www.atlasobscura.com/articles/colonial-india-british-hedge-salt-tax

Yours,

Paul H.