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No. 974 — GreencroftTownship of Greencroft, Durham Sheet 19 of 19thC Ordnance Map. Lat. 54° 50' 15", Long. 1° 44' 00". [ OS Grid Ref: NZ 17125 49229 (417125,549229) ] Account of Borehole No. 1 on Greencroft Common, as taken from Thomas Hall and others Approximate surface level 685 feet above sea (Ordnance datum)
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