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No. 2,488 — ButterknowleTownship of Lynesack and Softley, Durham Sheet 41 of 19thC Ordnance Map. Lat. 54° 38' 13", Long. 1° 50' 16½". [ OS Grid Ref: NZ 10470 26894 (410470,526894) ] Account of Strata passed through in a Bore-hole, put down in the North Corner of the Little Field behind the High Stables on the Loop Farm, for the Butterknowle Colliery Company, Limited, 1891. The surface level is 70 feet 6 inches below the level of the outcrop of the Brockwell Seam at Marsfield Approximate surface level 734.82 feet above sea (Ordnance datum)
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