Wall & Summerhouse at Hardwick Hall, Sedgefield (Sedgefield) - 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: 1029, 6, 27 |
| 2 | Wall & Summerhouse @ Hardwick Hall, Sedgefield | |||
| 3 | Durham County Council | 16-Dec-2016 | 6 photographs of Wall & Summerhouse @ Hardwick Hall, Sedgefield |