Thorngrafton Shaft Mounds (Bardon Mill) - 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The information on this website is based on a range of published and unpublished works.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) Instone, E and Cranstone, D, November 1994. Monuments Protection Programme: The Coal Industry. Introduction to Step 3 Site Assessments (Appendix 1, N'land 10)