The Poor Law Records were recorded in Application and Report Books (ARBs), sixteen of which are stored in the Hertfordshire Archives and Local Studies (HALS), offering a varied spatial and temporal coverage.

The books have been collected by an HHB thesis-writer and are now part of the HHB storage. They provide data about around 4000 households (7000 observations, since the same households often recur over time) and 17000 individuals.