Cylchgronau Cymru

It is a pleasure to acknowledge the helpful contributions of several correspondents including M. Ll. Chapman, E.H.C. Davies, G.S.Ridyard, T.M. Humphreys, D.H. Jones, Mrs P. Partridge T. Ripley and G.C.G. Thomas,. The author is grateful to the staff of the Powis Estate Office for permitting access to private estate documents held there and to many owners of present and former mills. In attempting to cover such a broad topic in detail the author is conscious of the potential for errors and omissions and would be pleased to receive any corrections and additions from readers with local knowledge. Address for correspondence: The Coppice, Guilsfield, Welshpool, Powys SY21 9PZ. ACKNOWLEDGEMENTS