Dear Mari, Some years ago I wrote an M.Phil thesis on linguistic change in two North Welsh primary schools, Llansanffraid Glan Conwy and Beddgelert. The thesis traces the course and fortunes of the Welsh language in the two schools from their establishment in the middle of the last century, to approximately 1989. The title is 'Inward Migration & Linguistic Change' and is available in the library of University College, Bangor. My address is P.O. Box 1966, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia. John Christopher Williams, Saudi Arabia