Cotherstone Castle, Hallgarth Hill, Cotherstone (Cotherstone) - Source of Reference
| No. | Originator(s) | Date | Title | Notes |
|---|---|---|---|---|
| 1 | Ordnance Survey | Ordnance Survey Archaeology Card AKA National Non-Intensive Archaeological Record (England) | NZ01NW6 | |
| 2 | I'Anson, W M | 1913 | The castles of the North Riding | p 341 - 343 |
| 3 | Whellan, T | 1859 | York and the North Riding | vol.2 |
| 4 | Royal Air Force | 18-Sep-1944 to 05-Oct-1949 | Durham County Council Digital Vertical Aerial Photograph Collection of Royal Air Force Aerial Photographs | RAF 106G.UK.1700 27 8 46 2144-45 |
| 5 | Clack, P A G, Gosling, P F, Northern Archaeological Survey, Harding, D W | 1976 | Archaeology in the North Report of the Northern Archaeological Survey | p 211 |
| 6 | Clack, P A G, Gosling, P F, Northern Archaeological Survey | 1975 | Archaeology in the North Gazetteer 1975 | |
| 7 | Emsley, R W | Richard W Emsley (RE/RWE) Field Investigators Comments | 23-JUN-1972 | |
| 8 | 01-Aug-1974 to 31-Dec-1976 | Gordon Solomon Robinson (GSR) Ordnance Survey Archaeology Officer | 9-JUL-1976 | |
| 9 | Topping, P | Peter Topping Field Investigators Comments RCHME: Durham SAMs project | 16-SEP-1991 | |
| 11 | 01-Jan-1199 to 31-Dec-1216 | Calendar of the Charter Rolls - Rotuli Chartarum | ||
| 12 | Unknown | Aerial photograph of Cotherstone Castle | ||
| 13 | Unknown | Aerial photograph of Cotherstone Castle |