Gill Shop lead mine, Ettersgill Common, Forest & Frith (Ettersgill) - Source of Reference
| No. | Originator(s) | Date | Title | Notes |
|---|---|---|---|---|
| 1 | Wilcock, D | 1996 to 1998 | IRIS (Index Record for Industrial Sites) Survey Archive | 83170 |
| 2 | Ordnance Survey | 1856 to 1865 | First Edition Ordnance Survey Map | 6", Durham 31, 1861 |
| 3 | Ordnance Survey | 1894 to 1899 | Second Edition Ordnance Survey Map | 6", Durham 31 SW, 1898 |
| 4 | Newcastle City Archaeology Unit, Truman, L | 01-Jan-1994 to 31-Dec-1994 | RCHME: North Pennines Industrial Archaeology Project |