Except for the brief period from March 1803 to March 1806, no official registers of passengers leaving Irish ports were ever kept. The exception refers to lists

These passenger lists, which cover the period of the Irish Famine and its aftermath, identify the emigrants' "actual places of residence", as well as their port

His new book, Finding Your Irish Ancestors, is intended as a companion volume to the venerable Pocket Guide. Making use of the case study technique employed in