A Franciscan scholar and theologian, John Peckham (c.1230–92) was appointed archbishop of Canterbury by the pope in 1279. His register survives at Lambeth Palace and is the chief source for his archiepiscopacy. This three-volume edition, prepared by Charles Trice Martin (1842–1914) between 1882 and 1885, rearranges the documents from their original thematic order to a chronological one, and omits the purely formal items, published elsewhere. The text is mostly in Latin, with some Anglo-Norman documents, for which a translation is provided in Appendix 1. Volume 3 contains letters 562–720, from July 1284 to July 1292. Topics include Anglo-Welsh relations and disputes between the Franciscans and other orders at Oxford. Appendix 2 contains an abstract of the entire register, describing the documents left out of this edition. Also provided is an index to the entire work.