What is this record collection?
Once the Primary Valuation had been published for any county (See Griffith's Valuation, 1847-1864 for details of relevant dates), the records would need to be kept up to date in order to make sure the right people were liable for the Poor Law rate etc. This became the Herculean task of the Valuation Office. Click on this link to go to the page for this institution where I have written up my experiences with using these rainbow-hued resources!