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No. 324 — Burdon Main, otherwise Collingwood MainTownship of Chirton, Northumberland Sheet 89 of 19thC Ordnance Map. Lat. 55° 00' 22", Long. 1° 27' 49". [Longtitude corrected from published data] [ OS Grid Ref: NZ 34303 68089 (434303,568089) ] Account of Strata sunk through at the Chirton Pit, Collingwood Main Colliery Approximate surface level 115 feet above sea (Ordnance datum)
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