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No. 2,609 — CowpenTownship of Cowpen, Northumberland Sheet 73 of 19thC Ordnance Map. Lat. 55° 07' 10", Long. 1° 31' 48". [ OS Grid Ref: NZ 29973 80669 (429973,580669) ] Account of Strata sunk through in the Isabella Pit, Cowpen Colliery, between the Low Main and the Brockwell Seams. Continuation of No. 590 Approximate surface level 45 feet above sea (Ordnance datum)
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