64 & 66 Newgate (Spring Grove), 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, 6, 145 |
| 2 | Durham County Council | 64 & 66 Newgate (Spring Grove) Barnard Castle | ||
| 3 | Durham County Council | 66 Newgate (east end rear wing) | ||
| 4 | Durham County Council | 64 & 66 Newgate (chimney details) | ||
| 5 | Durham County Council | 64 Newgate, Barnard Castle | ||
| 6 | War Office Northern Command | 01-Jun-1918 | List of Lands and Buildings in the occupation of the War Department, 1st June 1918. |