| Clue | Source | Date |
|---|---|---|
| Where queen would be executed - or hang, if theory is wrong | ||
| Former Northamptonshire castle where Richard III was born | The Times Specialist Sunday | 30 Apr 2023 |
| Castle in Northants where Mary Queen of Scots was executed | The Telegraph General Knowledge | 03 May 2020 |
| Where Mary Queen of Scots was executed | The Times Concise | 27 Apr 2015 |
| Cycle hard, indeed, going behind back of old castle | The Times Cryptic | 01 Apr 2015 |