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No. 1,708 — Seaton DelavalTownship of Seaton Delaval, Northumberland Sheet 81 of 19thC Ordnance Map. Lat. 55° 04' 52", Long. 1° 31' 56". [Latitude corrected from published data] [ OS Grid Ref: NZ 29860 76402 (429860,576402) ] Account of Strata sunk through in the E and F Pits, Seaton Delaval Colliery, from the surface to the Yard Coal Seam Approximate surface level 110 feet above sea (Ordnance datum)
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