This is the sixth volume in a continuing series of publications listing and identifying all illustrations contained in English manuscripts from the time of Chaucer to Henry VIII. This was an important period in the history of book production in Britain, and the range of subject-matter illustrated is of significance to historians of art, religion, literature, costume, natural science, and social custom. The present volume extends the survey to Wales and catalogues not only English manuscripts in Welsh collections but also Welsh manuscripts, including those held outside Wales. The catalogue contains entries for 128 manuscripts and notes the subject-matter of every illustration in each manuscript, from full-page miniatures and historiated initials to marginalia, added drawings and nota bene signs. A comprehensive index of pictorial subjects provides readers with complete references to the visual material with thematic groupings making the following categories easily accessible: animals, architecture, birds, Christ, containers, costume, furniture, kings, musical instruments, occupations/professions, plants, saints, tools, Virgin Mary, weapons, and women. The volume also inclids a user’s guide, an extensive glossary of subjects and terms, including Welsh terms, and indexes of authors/texts and of manuscripts with coats of arms.