These two works-in-one are a valuable instrument for tracing Irish family origins. The first, the "Special Report", shows the areas in Ireland with which family names are most frequently associated. In fact, it has a 39-page table listing of about 2,400 surnames, alphabetically arranged, indicating the number of occurrences of each surname in the various provinces and counties of Ireland. "Varieties and Synonymes of Surnames", the second report, consists of a 32-page list of 2,091 names and their variations as well as a separate key to the Registers' Districts and Unions in which the surnames are located.