Bodleian Library

Bodleian Manuscripts

British Library

British Library On-Line Catalogue

British Library Manuscripts Catalogue

Cambridge University Library

Early English Books Online

Folger Shakespeare Library

Friends Library, London

Guildhall, London

Historical Manuscripts Commission

House of Lords Record Office

Huntington Library

Institute of Historical Research

John Rylands Library, Manchester

Lambeth Palace Library

Library of Congress

Linen Hall Library, Belfast

London Metropolitan Archives

National Archives of Ireland

National Library of Scotland

National Register of Archives, UK

Newberry Library, Chicago

Public Record Office, London

Public Record Office of Northern Ireland

Trinity College, Dublin

University of Edinburgh Library

University of London Library

William Andrews Clark Memorial Library

York Minster Library