Cambridge University Library, Ff. i.27 is a composite manuscript at the University of Cambridge. It was formed by adding a 14th-century Bury St Edmunds book to a compendium of material from 12th-century northern England. The latter compendium had once been part of Corpus Christi College Cambridge MS 66. With its original content, it had at one time been at Sawley Abbey in Lancashire, though it was probably produced somewhere else, perhaps Durham. It is a source for the Durham poem, which describes the city and its relics.