Digital library containing some of the core printed primary and secondary sources for the medieval and modern history of the British Isles. Most of the material is free, but some is not. See this page for a list of material that is NOT free. We have access to some of that subscription material in State Papers Online
The CPI inflation calculator uses the average Consumer Price Index for a given calendar year. This data represents changes in prices of all goods and services purchased for consumption by urban households. This index value has been calculated every year since 1913. For the current year, the latest monthly index value is used.