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No. 378 — ButterknowleTownship of Lynesack and Softley, Durham Sheet 41 of 19thC Ordnance Map. Lat. 54° 37' 43", Long. 1° 49' 33". [ OS Grid Ref: NZ 11243 25968 (411243,525968) ] Section of Borehole at Coperas, in Hagger Leases Lane, about 70 yards North-west from Coperas. Commenced May 20th, 1845, and considered to be begun about three fathoms under Main Coal Approximate surface level 650 feet above sea (Ordnance datum)
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