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No. 2,757 — HedleyTownship of Hedley, Northumberland Sheet 104 of 19thC Ordnance Map. Lat. 54° 55' 42", Long. 1° 53' 17". [ OS Grid Ref: NZ 07173 59309 (407173,559309) ] Account of Strata sunk and bored through near the mouth of the Brockwell Seam Drift at Hedley Colliery, by Mr. Frank Coulson, October, 1888 Approximate surface level 620 feet above sea (Ordnance datum)
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