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No. 349 — ButterknowleTownship of Lynesack and Softley, Durham Sheet 41 of 19thC Ordnance Map. Lat. 54° 37' 25", Long. 1° 52' 27". [ OS Grid Ref: NZ 08124 25405 (408124,525405) ] Account of Boring in Christopher Wilson's Field, where Air Pit is now sunk at High Copley Approximate surface level 888 feet above sea (Ordnance datum)
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