| A | B |
|---|
| Boom | The barricade placed across the River Foyle |
| Glorious Revolution | The replacement of James II by William and Mary |
| Richard Talbot | Earl of Tyrconnell |
| Apprentice Boys | Youths who closed the gates to the Jacobite forces |
| Mountjoy | Ship which broke the boom |
| James Edward | Son born to James II in 1688 |
| William III | Son-in-law of James II |
| Colonel Lundy | Governor of Londonderry who believed the city should surrender |
| George Walker | Governor of Londonderry |
| 18 December 1688 | Gates of Londonderry closed against the Jacobites |
| Earl of Antrim | Led Jacobite forces during main siege |
| March 1689 | Main siege began |
