Robert Williams Lexicon Cornu-Britannirum, a Dictionary of the Ancient Celtic Language of Cornwall [PDF ebook] In Which the Words Are Elucidated by Copious Examples From the Cornish Works Now Remaining; With Translations in English, the Synonyms Are Also Given in the Cognate Dialects of Welsh, Armoric, Irish, Gaelic, and Manx; Shewing at One View the Connexion Bet