Latin text of Welsh law, which was known to lawyers active in Gwynedd during the 13th century. This text or a related one may have provided the basis for the Latin text in London, British Library, MS Cotton Vespasian E xi, which refers to matters relating to both Gwynedd and south-west Wales. It has been suggested that the Llyfr y Tŷ Gwyn text became known in Gwynedd through the agency of Cadwgan, bishop of Bangor (1215-1236) and abbot of Whitland before that.
Hypothetical lost manuscript, perhaps a gospel-book, associated with the Céli Dé monastery of Loch Leven. An old volume of the Scots (veteris voluminis antiquo Scotorum idiomate conscripti) is cited in the St Andrews register as having served as the source for a series of Latin charter records for Loch Leven. The presence of such records added to the margins and available spaces in the Book of Kells and other gospel-books suggests that the Loch Leven manuscript, too, or its source, may have been a gospel-book.
- s. x-xii (?)
Five vellum leaves.
- s. xvex
17th-century Irish manuscript containing materials concerning the history of Ireland, including a copy of the Annals of the Four Masters (ff. 36-86).
- s. xviiin
- s. xvii
- James Ware
Paper manuscript belonging to James Ware (d. 1666) and in part, written by him. It contains transcripts of Irish texts and items from Irish texts.
- s. xvii
- James Ware
17th-century collection of historical documents. Includes a part of the Annals of Ulster, s.a. 1486-1504, in English translation., with the Latin parts left untranslated.
- s. xvii (?)
Antiquarian notebook of collectanea relating chiefly to Ireland.
- s. xvii
Collectanea relating chiefly to Ireland.
- s. xvii
Collection of historical documents. Incl. the Annals of Ulster, s.a. 431–1132 and 1156–1307, with the Irish portions translated into English.
- s. xvii
