The object of this bibliography is to provide the serious student and the interested layman with a guide to the location and nature of the principal manuscript and printed sources, as well as an indication of the range of secondary material available in the form of books, articles, and theses. I have resisted the temptation to include a list of Welsh and English books printed during the period under study, partly in order to avoid swelling the bibliography unnecessarily but mainly because a major bibliography by Eiluned Rees, Libri Walliae: A Catalogue of Welsh Books and Books Printed in Wales, 1546-1820 (The National Library of Wales, Aberystwyth, 1987) provides a comprehensive catalogue.
Most British bibliographies are characterized by a marked anglocentric bias, and those which cover this period are no exception. There are short and generally inadequate sections on Wales in: Bibliography of British History: Stuart Period, 1603-1714, ed. Godfrey Davies revised by Mary Frear Keeler ( 2nd edn., Oxford, 1970); Bibliography of British History: The Eighteenth Century, 1714-1789, eds. Stanley Pargellis and D. J. Medley ( Oxford, 1951); A Bibliography of British and Irish Municipal History, eds. G. H. Martin and Sylvia McIntyre (vol. 1, Leicester, 1972).
Until very recently, the chief bibliographical aid was The Bibliography of the History of Wales ( 2nd edn., Cardiff, 1962), together with supplements published in the Bulletin of the Board of Celtic Studies 20 (May) 1963, 22 (November) 1966, 23 (November) 1969, and 25 (November) 1972). However, this has now been superseded by a splendid comprehensive bibliography commissioned by the History and Law Committee of the University of Wales Board of Celtic Studies. Edited by Philip Henry Jones, A Bibliography of the History of Wales ( 3rd edn., University of Wales Press, Cardiff, 1989) contains around 22,000 citations in microfiche form. The reader may also consult copious lists of new works in Bibliotheca Celtica: A Register of Publications relating to Wales and the Celtic Peoples and Languages ( 1909-). Recent publications in article form are printed annually in the December issue of The Welsh History Review. An extremely valuable publication, especially for those interested in exploring this period in detail, is Alun Eurig Davies (ed.). Welsh Language and Welsh Dissertations accepted by British, American and German Universities, 1887-1971 ( Cardiff, 1973), together with supplements in Studia Celtica 10-27 ( 1975-92). Up-to-date checklists of recently completed theses have also been published by David Lewis Jones in The Welsh History Review 6 (June) 1971, 7 (June) 1974, 9 (June) 1978, 11 (December) 1982, 13 (June) 1986, 14 (June) 1989.
The standard bibliography of secondary material on Welsh language and literature is Thomas Parry and Merfyn Morgan (eds.), Llyfryddiaeth Llenyddiaeth Gymraeg ( Cardiff, 1976). There is a supplement to this edition, compiled by Gareth O. Watts, in the Bulletin of the Board of Celtic Studies 30 (November) 1983.