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James Charles Napoleon Humphreys, Mining papers Item
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Underground workings
Underground workings
Underground plan of Leader, Horsham and East Reef workings
Underground plan of Leader, Horsham and East Reef workings
Underground plan of Leader, Horsham and East Reef workings
Underground plan of Leader, Horsham and East Reef workings
Underground plan of Leader, Horsham and East Reef workings
Underground plan of Leader, Horsham and East Reef workings
Underground plan of Main Reef Leader working
Underground plan of Main Reef Leader working
Underground plan of Main Reef Leader workings
Underground plan of Main Reef Leader workings
Underground plan of Main Reef Leader workings
Underground plan of Main Reef Leader workings
Underground plan of Main Reef Leader workings
Underground plan of Main Reef Leader workings
Underground plan of Upper Leader and Black Reef Leader workings
Underground plan of Upper Leader and Black Reef Leader workings
Underground plan of Upper Leader and Black Reef Leader workings
Underground plan of Upper Leader and Black Reef Leader workings
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