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No. 1,093 — HeatonTownship of Heaton, Northumberland Sheet 97 of 19thC Ordnance Map. Lat. 54° 59' 20", Long. 1° 34' 17". [ OS Grid Ref: NZ 27422 66125 (427422,566125) ] Bored in trial for the Low Main Coal Seam, in the C Pit, Heaton Colliery. 1805 Approximate surface level 160 feet above sea (Ordnance datum)
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