Book excerpt: A study of the language of Chaucerian manuscripts, printed editions and Chaucer's 15th century followers. Winner of the 2005 Beatrice White Prize for outstanding scholarly work in the field of English literature before 1590 The manuscript copies of Chaucer's works preserve valuable information concerning Chaucer's linguistic practices and the ways in which scribes responded to these. This book draws on recent developments in Middle English dialectology, textual criticism and the application of computers to manuscript studies to assess the evidence Chaucerian manuscripts provide for reconstructing Chaucer's own language and his linguistic environment. This book considershow scribes, editors and Chaucerian poets transmitted and updated Chaucer's language and the implications of this for our understanding of Chaucerian book production and reception, and the processes of linguistic change in the fifteenth century. Winner of the 2005 Beatrice White Prize for outstanding scholarly work in the field of English literature before 1590 SIMON HOROBIN lectures on English language at the University of Glasgow.