He edited the "Close Rolls, Rotuli litterarum clausarum", 1204–1227 (2 vols., 1833–1844), with an introduction entitled "A Description of the Close Rolls, with an Account of the early Courts of Law and Equity"; and the "Patent Rolls, Rotuli litterarum patentium", 1201–1216 (1835), with introduction, "A Description of the Patent Rolls, to which is added an Itinerary of King John." He also edited the "Rotuli de oblatis etfinibus" (1835), which deal also with the time of King John; the "Rotuli Normanniae", 1200–1205, and 1417–1418 (1835), containing letters and grants of the English kings concerning the duchy of Normandy; the "Charter Rolls, Rotuli chartarum", 1295–1216 (1837), giving with this work an account of the structure of charters; the "Liberate Rolls, Rotuli de liberate ac de misis et praestitis regnante Johanne" (1844); and the "Modus Tenendi Parliamentum", with a translation (1846).