This is the first comprehensive linguistic study for 50 years of the stones from western Britain and Brittany, inscribed in the Roman and Irish Ogam alphabets.

• First comprehensive study for 50 years of the stones from western Britain and Brittany, inscribed in the Roman and Irish Ogam alphabets.
• Provides a linguistic analysis of the 370 Brittonic and Irish inscriptions.
• Presents new phonological evidence for the dating of the inscriptions.

Patrick Sims-Williams is Professor of Celtic Studies at the University of Wales, Aberystwyth. He is the author of ‘Religion and Literature in Western England, 600-800’ (1990) and ‘Britain and Early Christian Europe’ (1995). He is also the co-editor of ‘Ptolemy: Towards a Linguistic Atlas of the Earliest Celtic Place-Names of Europe’ (2000), and the editor of Cambrian Medieval Celtic Studies.