Thorngate Mill, Thorngate, Barnard Castle (Barnard Castle) - 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: 770-1, 5, 225 |
| 2 | Durham County Council | Thorngate Mill in 2002 | ||
| 3 | Durham County Council | Thorngate Mill (north side) in 2002 | ||
| 4 | Durham County Council | Residential Conversion of Thorngate Mill | ||
| 5 | Durham County Council | Residential Conversion of Thorngate Mill |