Mackenzie's Memorials of the Siege of Derry is a historical account of the 105-day siege of Derry that took place in 1689 during the Williamite War in Ireland. The book is written by John Mackenzie, who was a participant in the siege and served as a captain in the defending army. The book is divided into two parts: the first part is Mackenzie's personal narrative of the siege, and the second part is a vindication of his account against the criticisms...