Irish Witchcraft and Demonology was originally published in 1913. It is a thorough investigation into Ireland's historical accounts of witchcraft and supernatural occurrences. Drawing from legal records, trial documents, and folklore, Seymour meticulously documents the various witch trials and instances of alleged demonic activity in Ireland from the medieval period through the 18th century. His scholarly approach provides a detailed and contextualized understanding of how witchcraft was perceived and prosecuted in Ireland, making this book an invaluable resource for historians and folklorists interested in the country's cultural and social history.

St. John D. Seymour (1884-1950) was an Irish Anglican clergyman, historian, and folklorist renowned for his work on Irish witchcraft and folklore. Educated at Trinity College, Dublin, he served in various clerical positions within the Church of Ireland. His work is valued for its meticulous research and remains a significant resource for scholars of Irish history and folklore.