A digital library and index of primary and secondary sources and British and Irish history resources, which currently (Jan. 2016) contains material from over 1,250 printed volumes. Also provides digitized versions of guides and calendars held at the National Archives at Kew, and historic maps, including the 19th-century Ordnance Survey. Augmented by scholarly born-digital resources like browsable datasets compiled from taxes, references to medieval market privileges, and central courts such as the Court of Common Pleas. Also includes useful subject guides to local, parliamentary, urban, and religious history with essays and bibliography. A small amount of content is restricted to subscription holders.