William R. Young’s Fighters of Derry has for decades been one of the most overlooked works on the Siege of Derry and as a local genealogical resource. First published in 1932, the book was the product of ten years’ research into identifying participants at the siege which the author undertook when suffering from ill-health in the latter part of his life.

The book is essentially divided into two parts: the first contains 1660 biographical entries relating to the defenders of Derry, tracing, where possible, the family lineage; and the second part includes 352 entries on the Jacobite side. Apart from individual accounts of eminent protagonists in the siege, such as David Cairnes, Rev. George Walker, the Duke of Schomberg, Patrick Sarsfield, etc., there is also background given to many of the most influential families involved in the conflict.