Mary-Ann Constantine is a Reader in Welsh and English literature at the University of Wales Centre for Advanced Welsh and Celtic Studies. Her work is concerned with the relations between and mutual influence of the different cultures and languages of Britain (and to some extent beyond) in the late-C18th and early-C19th centuries. She has published books on Breton folklore, ballads and songs, Romantic-era forgery, and Welsh responses to the French Revolution. Her current work is focused on travel writing, the Welsh Tour, and the writings of Thomas Pennant (1726-98).Éva Guillorel is an Associate Professor in Early Modern History at the Université de Caen Normandie. Her studies have included History, Ethnology and Celtic Languages, and she has held postdoctoral fellowships in Brittany, Québec, United States and England. Her works is concerned with oral cultures and languages in early modern Europe and Americas, mainly songs. She published her Ph.D. on the links between Breton Ballads and History. Her current work is focused on the circulation and transformation of oral cultures over space and time, including cultural transfers between Europe and North America.