Longcleugh Mine (Plenmeller with Whitfield) - Source of Reference
The information on this website is based on a range of published and unpublished works. Below is a list of the source of information used in writing this record.
(1) RCHME Data Exchange 1997 (NMR No: NY 75 SE 22)
(2) This record includes National Record of the Historic Environment Information provided by Historic England on 4 January 2021 licensed under the Open Government Licence [http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/]
(2a) Ordnance Survey Map OS, 1st edition, 6", Northumberland 106, 1865
(2b) Ordnance Survey Map OS, 2nd edition, 6", Northumberland 106 NE, 1898
(2c) Dunham, K.C., 1990. The Geology of the Northern Pennine Orefield, Vol 1, (HMSO), 151-2