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No. 222 — Black Shield BogTownship of Plainmeller, Northumberland Sheet 92 of 19thC Ordnance Map. Lat. 54° 56' 07", Long. 2° 25' 32". [ OS Grid Ref: NY 72737 60159 (372737,560159) ] Account of the Borings at Black Shield Bog Colliery, July 20th, 1808 Approximate surface level 908 feet above sea (Ordnance datum)
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