Period | Order | Probability | Radiocarbon Dates | Date Built | Date of Destruction | Date of Loss |
Prehistoric period uncertain
| B | 100 | | | | |
Medieval (1100 - 1560 AD)
| C | 100 | | | | |
16th Century
| D | 100 | | | | |
17th Century
| E | 100 | | | | |
Mesolithic (8000 - 4000 BC)
| A | 100 | | | | |
Post-Medieval (from 1560 AD)
| F | 100 | | | | |