This catalogue is a state-of-knowledge list of the English written between c 1150 and 1300, whether later versions of Old English texts or original early Middle English. With over 500 entries relating to manuscripts containing writing in English, it describes in detail literary material, both prose and verse, documentary texts, and glosses. The catalogue draws together an extensive body of information only available up to now from widely scattered sources. As well as being listed by their repositories, the manuscripts are also separately indexed by text. Information is provided on dates, hands, manuscript associations and language. Also given are references to editions and secondary literature.