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No. 450 — ChirtonTownship of Chirton, Northumberland Sheet 89 of 19thC Ordnance Map. Lat. 55° 00' 58", Long. 1° 27' 50". [ OS Grid Ref: NZ 34277 69201 (434277,569201) ] Account of Strata in Walker's Ground, at Chirton, as bored to the Stone Head, January 22nd, 1754 Approximate surface level 185 feet above sea (Ordnance datum)
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