Letters patent resemble charters, as they contained the more public directions of the kings, such as grants of offices and lands and licenses of all kinds.
Great Britain. Public Record Office. Patent Rolls of the Reign of Henry III Preserved in the Public Record Office. 6 Vols. London: Mackie for HMSO, 1901-1903.
Abstract: Consists of mandates, pardons, letters of safe conduct, grants of offices, appointments, and commissions. Vols 1 & 2 are actual Latin transcripts of the full text., vols. 3-6 in English, are calendars of the rolls. Vol. 1, AD 1216-1225; Vol. 2, AD 1225-1232; Vol. 3, AD 1232-1247;Vol. 4, AD 1247-1258;Vol. 5, AD 1258-1266; Vol. 6, AD 1266-1272.
Hardy, Thomas D., ed. Rotuli Litterarum Patentium in Turri Londinensi Asservati . London: Eyre & Spottiswoode, 1835.
Abstract: Text in Latin. Letters patent or charters, grants and privileges from the Court of Chancery for the reign of King John. Prefixed by Itinerary of King John. Vol. 1, Part 1, AD 1201-1216. No further volumes published.
Hunter, Joseph, ed. Rotuli Selecti Ad Res Anglicas Et Hibernicas Spectantes, Ex Archivis Et Hibernicas Spectantes, Ex Archivis in Domo Capitulari West-Monasteriensi, Deprompti. London: G. Eyre and A. Spottiswoode, 1834.
Abstract: I. Transcripts from the patent roll of 7 John.; II. Transcripts of the original writ and return of all discharges of debts etc., granted by the Irish exchequer, temp. Henry V and Henry VI; III. Six rolls of pleas de terris datis et occupatis, mainly for the counties of Cambridge, Essex, Northampton, and Suffolk, temp. Henry III.