| ID | Repository | Reference | Date | Description | Collection |
|---|---|---|---|---|---|
| 7450 | Public Record Office of Northern Ireland | D/4073 | 1820-1908 | A detailed calendar of the Armstrong papers is avail... |
| ID | Repository | Reference | Date | Description | Collection |
|---|---|---|---|---|---|
| 7450 | Public Record Office of Northern Ireland | D/4073 | 1820-1908 | A detailed calendar of the Armstrong papers is avail... |