This is the Fourth edition of this comprehensive guide to family history research in Dublin City and County. The new edition is totally updated and expanded, with new illustrations and material. It describes how to best use the records available, and where they can be accessed. For each type of record it provides background information on how they were compiled and what information was contained, and on which categories of people. It also provides background on the social history of Dublin and how this history has affected the keeping and survival of records.