English: The coalfield of north east England and its rivers.
Acknowledgments and sources: The location of the coalfield is from Nicholas Wood, On the improvements and progress in the working and ventilation of coal mines in the Newcastle-on-Tyne district within the last fifty years, Proceedings of the Institution of Mechanical Engineers, 1858, plate XII. The base map (rivers and coastline of NE England) is selected from the open source Open Historical Maps. The inset outline map of England is from File:England in the uk outline map.png (Wikimedia Commons, by ChrisO modified by User:Xhandler).
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