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					Originally Posted by  ariel
					 
				 
				... I have read the same info about the source of blades as mentioned by David ( was it in Rawson?). ... 
			
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 Yes, that was from Rawson. He showed an example in his book. I think Rawson attributes the steel to stolen hoe blades. British tea plantations in Assam and neighboring areas began in the 18th C. These areas are generally considered "iron-poor" so a lot of recycling of old iron/steel occurred, and many weapons were imported from neighboring and distant tribal groups, including the Burmese, Shan, Kachin/Lisu and Achang.