The Johnston Collection contains over 1,500 items and approximately 75% of its records are available for viewing here.
The collection includes ceramics, furniture, glass, horology (clocks and watches), metalwork (including silver), paintings (including miniatures and engravings), textiles, and objets d’art predominantly of English 18th century origin, as well as items from Europe, India, China and Japan.
| Monday | Closed |
| Tuesday | Closed |
| Wednesday | 10:00–16:00 |
| Thursday | 10:00–16:00 |
| Friday | 10:00–16:00 |
| Saturday | 10:00–16:00 |
| Sunday | 10:00–16:00 |