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No. 1,072 — HartleyTownship of Seaton Delaval, Northumberland Sheet 81 of 19thC Ordnance Map. Lat. 55° 05' 02", Long. 1° 30' 45". [ OS Grid Ref: NZ 31116 76720 (431116,576720) ] Account of Strata sunk through at the Hester Pit, Hartley Colliery. Commenced January 1st, 1845. Low Main Seam reached May 29th, 1846 Approximate surface level 102 feet above sea (Ordnance datum)
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