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No. 3,005 — ThirlwallTownship of Thirlwall, Northumberland Sheet 82 of 19thC Ordnance Map. Lat. 54° 59' 42", Long. 2° 33' 14". [ OS Grid Ref: NY 64568 66861 (364568,566861) ] Account of Strata passed through in a Bore-hole near the Barn House, Gilsland. Commenced March 30th, 1899 Approximate surface level 450 feet above sea (Ordnance datum)
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