David, 
 
Well said. It would be interesting to learn how they got their raw material. Did they smelt and refine iron ore from scratch? Research suggests that iron was independently bloomed & smelted in sub-Saharan Africa from iron-rich sand. The techniques apparently did not arrive via cultural diffusion as had been previously believed. 
 
Best, 
Ed
		 
		
		
		
		
		
		
		
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