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No. 3,006 — ThirlwallTownship of Thirlwall, Northumberland Sheet 82 of 19thC Ordnance Map. Lat. 55° 02' 32", Long. 2° 32' 00". [ OS Grid Ref: NY 65923 72105 (365923,572105) ] Account of Strata passed through in the No. 1 Bore-hole on Thirlwall Common, 1900-1901 Approximate surface level 695 feet above sea (Ordnance datum)
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