This work is a singular mass of information illustrating the lineage, honours and achievements of families connected with Ireland by birth, rank, title or alliance which took the author over 50 years to compile. Many of his sources are now lost to time, but his work survives.
A body of 30.000 - 40,000 Irish, plundered of their estates left Ireland under different leaders, and entered the service of France, Spain, Austria and Venice. The 'Wild Geese' of Ireland are each documented here by name. (Every family from 70 regiments is D'Altons starting point.) For Each family D'Alton gives historical and genealogical illustrations. For Irish families he concentrates particularly on ancient locations. For families who came to Ireland from England and Scotland, he often gives the place from which they came and at what date .
D'Alton, dedicated to the ancient family history of each of the Wild Geese of Ireland, takes each family into to the 17th century confiscations and Acts of Settlements down to the 1800's as possible. The information in this work will link Irish families together worldwide back to the homeland.