"Used as proof of age in order to qualify for an old age pension, family data was extracted from the censuses of 1841 and 1851 and recorded in the Old Age Pension records summary books before the Public Record Office fire of 1922! Thus some census data was inadvertently salvaged, including (1) the name of the head of household; (2) his marriage date; (3) his wife's name; (4) his place of residence; (5) the names of his children; (6) the names of other family members living with him; (7) occasionally the names of servants, lodgers, and visitors; and (8) persons deceased in the ten years prior to the census. These several elements form the basis of this present work. Entries are in alphabetical order and are cross-indexed for relatives, lodgers, visitors, and servants. There are also cross indexes for married and maiden names of daughters and wives. In addition, this work contains census fragments and miscellaneous census data from both the Public Record Office of Northern Ireland (Belfast) and the National Archives in Dublin, including a list of surnames for Killeshandra Parish, County Cavan (1841) and the Union of Kilworth, County Cork (1851)"--The publisher.