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No. 1,541 — PlainmellerTownship of Plainmeller, Northumberland Sheet 92 of 19thC Ordnance Map. Lat. 54° 56' 31", Long. 2° 23' 55". [Latitude corrected from published data] [ OS Grid Ref: NY 74467 60890 (374467,560890) ] First hole, bored at Plainmeller Common, about 630 yards West from Rock House. August 26th, 1820 Approximate surface level 1,000 feet above sea (Ordnance datum)
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