Rotuli Litterarum Patentium [The Patent Rolls]

Rotuli Litterarum Patentium [The Patent Rolls], Thomas Duffus Hardy

The Rotuli Litterarum Patentium (Duffus Hardy's earlier edition of the material contained in the Calendar of Patent Rolls) is one of the largest and most important sources for English medieval history, containing letters, writs and mandates issued by the Crown that were considered of a public nature (in contrast to the Close (or closed) Rolls).