Gapshields lime kiln and quarry (Thirlwall) - 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The information on this website is based on a range of published and unpublished works.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) Limekilns - Traditional Type Data Sheet no 98, WG 13-JUN-1976 (info Dr S Linsley, Newcastle University)
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) Vertical aerial photograph reference number RAF 106G/UK/1392 3178 10-APR-1946