Griffith's Valuation is the best-known 19th-century Irish census substitute. But the published Valuation itself is only the tip of the iceberg. Before publication, a huge surveying operation produced mountains of documents, most now available online, and after publication revisions were produced continually up to the 1980s, providing an excellent source of information on possible living relatives. The talk details the creation of the records, their locations and access, online and offline.
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