From the 1820s to the 1840s a complex process of reform attempted to standardise the basis of local taxation in Ireland. The first steps were to map and fix administrative boundaries through the Ordnance Survey and the associated Boundary Commission. The next step was to assess the productive capacity of all property in the country in a thoroughly uniform way. Richard Griffith, a geologist based in Dublin, became Boundary Commissioner in 1825 and Commissioner of Valuation in 1827. The results of his great survey, the Primary Valuation of Ireland, were published between 1847 and 1864. The valuation is arranged by county, barony, Poor Law Union, civil parish and townland, and it
lists every landholder and every householder in Ireland. Apart from townland address and householder's name, the particulars given are:
The only directly useful family information supplied is in areas where a surname was particularly common. The surveyors often adopted the traditional Irish practice of using the father's first name to distinguish between individuals of the same name, so that 'John Reilly (James)' is the son of James, while 'John Reilly (Michael)' is the son of Michael. For similar reasons, occupations are also sometimes used to tell 'John Ryan (weaver)' from 'John Ryan (farmer)'. Copies of Griffith's Valuation are widely available in major libraries and record offices, both on microfiche and in their original published form. A free online version is at www.askaboutireland.ie.
The valuation was never intended as a census substitute, and if the 1851 census had survived it would have little genealogical significance. As things stand, however, it gives the only detailed guide to where in Ireland people lived in the middle of the nineteenth century and to what property they occupied. In addition, a huge quantity of material was produced both before publication and in subsequent revisions, making it possible in many cases to identify occupiers before the publication date and to trace living descendants of those originally listed by Griffith. (See Valuation Office Records)
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