The York Gospel is an Anglo-Saxon gospel book, which, in addition to the four gospels, contain the oaths taken by the deans and canons, documents about land ownership and the letter of King Cnut (r.1016-1035) that is reproduced here. The book was produced at Canterbury c. 1000 and came to York with Archbishop Wulfstan around 1020. It is one of only ten pre-conquest Gospel books to have survived the Reformation and is still used today for the Canons and Archbishop to swear their allegiance on.
A fuller description of this manuscript is available at The Production and Use of English Manuscripts 1060 to 1220.