Volumes 17 and 18 provide a scholarly edition of all the 185 charters from the period before the Norman Conquest that survive from the archiepiscopal cathedral of Christ Church Canterbury. Many of the charters exist in variant versions, and these are assessed for their authenticity. More of the Christ Church charters are preserved on single sheets of parchment from every century down to the eleventh than have survived from any other English church. Christ Church, indeed, has more authentic original charters, including many from the seventh, eighth and especially the ninth centuries, which are so rare elsewhere. There are also forgeries - at least from the beginning of the ninth century - which were produced over a longer period than those f...