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No. 2,123 — WalkerTownship of Walker, Northumberland Sheet 98 of 19thC Ordnance Map. Lat. 54° 58' 54", Long. 1° 32' 26". [ OS Grid Ref: NZ 29400 65334 (429400,565334) ] Account of Borehole in East Pit, Walker Colliery. July 2nd, 1770 Approximate surface level 48 feet above sea (Ordnance datum)
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