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No. 369 — ButterknowleTownship of Lynesack and Softley, Durham Sheet 41 of 19thC Ordnance Map. Lat. 54° 37' 30", Long. 1° 49' 49". [ OS Grid Ref: NZ 10957 25566 (410957,525566) ] Account of Boring at the Diamond Pit Approximate surface level 600 feet above sea (Ordnance datum)
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