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[http://en.wikipedia.org/wiki/Opium_Wars Wikipedia - Opium Wars]<br>[http://en.wikipedia.org/wiki/First_Opium_War 1st Opium War]<br>[http://www.pdavis.nl/China.htm W.L.Clowes on the Ist Anglo-Chinese War]<br>[httphttps://wwwen.oxforddnbwikipedia.comorg/indexwiki/101022626/ Dictionary of National Biography Henry_Pottinger Wikipedia - Sir Henry Pottinger]