9, 10 and 11 (The Forge), Factory, Castle Eden (Castle Eden) - Source of Reference
| No. | Originator(s) | Date | Title | Notes |
|---|---|---|---|---|
| 1 | Department of Environment, English Heritage, Historic Buildings and Monuments Commission | 1950 | List of buildings of special architectural or historic interest, also known as "Greenbacks" | LB Volume, Map & Item: 549, 9, 4 |
| 2 | Watson, P | 2002 | An Archaeological report on the parish of Castle Eden, Co Durham | |
| 3 | Durham County Council | Factory numbers 9, 10 and 11 | ||
| 4 | Durham County Council | Factory 9 | ||
| 5 | Durham County Council | Factory 10 | ||
| 6 | Durham County Council | Factory 11 (The Forge) |