Wood, Nicholas. (1862). ‘On the Upper and Lower Beds of Coal of the Counties of Northumberland and Durham’. Hardback copy of extract.Wood, Nicholas. (1862). On the Upper and Lower Beds of Coal of the Counties of Northumberland and Durham extract from the Proceedings of the North of England Institute of Mining Engineers. Hardback copy of extract. Title on spine is On the Plashets Coal Field. Brown cloth covered boards with leather half binding, worn and bumped with splits at top of hinges. Seven fold out colour printed maps and sections. Map and some sections extend to Yorkshire and