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No. 449 — ChirtonTownship of Chirton, Northumberland Sheet 89 of 19thC Ordnance Map. Lat. 55° 00' 15", Long. 1° 27' 29". [ OS Grid Ref: NZ 34660 67875 (434660,567875) ] Boring in the Long Bank, from the Stone Head in the old Sinking shaft, 1752 Approximate surface level 101 feet above sea (Ordnance datum)
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