- Aberdeen Archives
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- Ajaaloo Museum
- A K Bell Library, Perth
- All Souls College, Oxford
- Alscot Park, Stratford-upon-Avon
- Ampleforth Abbey
- Archives Départementales du Nord, Lille, France
- Archives générales du Royaume, Brussels, Belgium
- Archivo General, Simancas, Spain
- Armagh Public Library
- Athanaeum Library, Deventer, Holland
- Auckland Central City Library, New Zealand
- Professor Sir John Baker, Cambridge
- Balliol College, Oxford
- Bangor University
- Bank of England
- Gregory Baran and Laura Federighi Collection, Seattle
- Nicolas Barker, London
- The Marquess of Bath, Longleat House
- Bayerische Staatsbibliothek, Munich
- Dr Peter Beal, London
- The Duke of Beaufort, Badminton
- The Duke of Bedford, Woburn Abbey
- Bedfordshire Record Office
- Belton House, Grantham
- Berkeley Castle
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- The Earl of Bessborough
- Biblioteka Jagiellonska
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- Bibliothèque Municipale, Douai, France
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- Bibliothèque Nationale, Paris, Département de la Musique
- Bibliothèque Nationale, Paris
- Bibliothèque des Universités de Paris à la Sorbonne
- Bibliothèque Royale, Brussels, Belgium
- Birmingham Central Library
- Bischöfliches Zentralarchiv, Regensburg
- Bodleian Library, Ashmole Collection
- Bodleian Library: Clarendon MSS
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- Bodleian Library, Eng. hist. MSS
- Bodleian Library, Eng. misc. MSS
- Bodleian Library, Eng. poet. MSS, a through d
- Bodleian Library, Eng. poet. e. MSS
- Bodleian Library, Eng. poet. MSS, f through end
- Bodleian Library, Eng. th. MSS
- Bodleian Library, Malone Collection
- Bodleian Library, Music MSS
- Bodleian Library, Rawlinson Collection, Rawl. poet. 1 through 49
- Bodleian Library, Rawlinson Collection, Rawl. poet. 100 through 149
- Bodleian Library, Rawlinson Collection, Rawl. poet. 150 through 199
- Bodleian Library, Rawlinson Collection, Rawl. poet. 200 through end
- Bodleian Library, Rawlinson Collection, Rawl. poet. 50 through 99
- Bodleian Library, Rawlinson Collection, other shelfmarks
- Bodleian Library, Sancroft MSS
- Bodleian Library, Smith MSS
- Bodleian Library, Tanner Collection
- Bodleian Library, other MSS
- Bollandist Library, Brussels
- Borthwick Institute, York
- Boston Public Library
- Bradford Archives
- Brasenose College, Oxford
- Estate of John R.B. Brett-Smith, Princeton
- Brigham Young University
- Bristol Record Office
- British Council Library
- The British Library: Additional MSS, numbers 10000 through 14999
- The British Library: Additional MSS, numbers 15000 through 16999
- The British Library: Additional MSS, numbers 17000 through 17999
- The British Library: Additional MSS, numbers 18000 through 19999
- The British Library: Additional MSS, numbers 20000 through 24999
- The British Library: Additional MSS, numbers 25000 through 29999
- The British Library: Additional MSS, numbers 30000 through 34999
- The British Library: Additional MSS, numbers 35000 through 39999
- The British Library: Additional MSS, numbers 40000 through 44999
- The British Library: Additional MSS, numbers 4101 through 4999
- The British Library: Additional MSS, numbers 45000 through 49999
- The British Library: Additional MSS, numbers 5000 through 5999
- The British Library: Additional MSS, numbers 50000 through 54999
- The British Library: Additional MSS, numbers 55000 through 59999
- The British Library: Additional MSS, numbers 60000 through end
- The British Library: Additional Charters
- The British Library: Cotton MSS
- The British Library: Egerton MSS
- The British Library: Harley Collection, numbers 1 through 999
- The British Library: Harley Collection, numbers 1000 through 1999
- The British Library: Harley Collection, numbers 2000 through 2999
- The British Library: Harley Collection, numbers 3000 through 3999
- The British Library: Harley Collection, numbers 4000 through 4999
- The British Library: Harley Collection, numbers 5000 through 5999
- The British Library: Harley Collection, numbers 6000 through 6999
- The British Library: Harley Collection, numbers 7000 through end
- The British Library: Lansdowne MSS
- The British Library, Music Books and Manuscripts
- The British Library: Rare Books Room
- The British Library: Royal MSS
- The British Library: Sloane Collection
- The British Library: Stowe MSS
- The British Library: other MSS
- Buckinghamshire Record Office
- Buffalo & Erie County Public Library, Gluck Collection
- Bunyan Meeting Museum
- The Marquess of Bute
- Cambridge University Archives
- Cambridge University Library, Additional MSS 1 through 4999
- Cambridge University Library, Additional MSS 5000 through 6999
- Cambridge University Library, Additional MSS 7000 through end
- Cambridge University Library, shelfmarks A through D
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- Cambridge University Library, shelfmarks M through end
- Cambridgeshire Record Office
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- College of Arms
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- The Earl of Crawford and Balcarres
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- Curtis Museum, Alton, Hampshire
- Dalemain House
- Professor Pierre Danchin, Nancy, France
- Viscount Daventry, Arbury Hall
- The Viscount De L'Isle, Penshurst Place
- Deleted entry
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- English College, Rome
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- Eton College
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- The Family Album, Glen Rock, Pennsylvania
- Nicholas Fisher
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- The Folger Shakespeare Library, Miscellaneous manuscripts
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- The Folger Shakespeare Library, V.a.series, 1 through 99
- The Folger Shakespeare Library, V.a.series, 100 through 199
- The Folger Shakespeare Library, V.a.series, 200 through 299
- The Folger Shakespeare Library, V.a.series, 300 through end
- The Folger Shakespeare Library: V.b. series
- Fondation Custodia, Paris
- Franciscan Friars Minor Provincial Archives, London
- Free Library of Philadelphia
- Georgetown University
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- Gonville and Caius College, Cambridge
- Gräfflich Görtzisches Archiv
- Greffe
- The Guildhall, Hull
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- Gunton Park
- Paul Hammond
- Hampshire Record Office
- Hartlebury Castle, Hurd Library
- Harvard, fMS Eng 966.3
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- Harvard University, MS Eng 966.6
- Harvard University, MS Eng 966.7
- Harvard Business School, Kress Library
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- Harvard Theatre Collection
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- Harvard, other MSS
- Haverford College
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- Historical Society of Pennsylvania
- Theodore Hofmann
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- Lord Home of The Hirsel
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- Huddersfield Central Library
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- Hull History Centre
- Huntingdon Record Office
- The Huntington Library, shelfmarks A through E
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- Indiana University, Lilly Library
- Inner Temple Library
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- Jesuit Archives, Rome
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- John Rylands University Library of Manchester
- Estate of Dr Bent E. Juel-Jensen, Oxford
- Karpeles Manuscript Libraries
- Lord Kenyon
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- Law Society Library
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- Lehigh University
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- Nanki Music Library
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- National Library of Scotland, Advocates MSS
- National Library of Scotland, other MSS
- National Library of South Africa, Cape Town
- National Library of Wales
- National Maritime Museum
- National Museum Library (KNM), Prague
- Natural History Museum
- New College, Oxford
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- Newberry Library, Chicago
- Niedersächsische Staatsarchiv Oldenburg
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- Nottinghamshire Archives
- Ohio State University, English Department Library
- Oriel College, Oxford
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- Österreichische Nationalbibliothek, Vienna
- Oxford Music Faculty
- Oxford University Archives
- Parliamentary Archives
- Patriarca (Royal College of Corpus Christi), Valencia, Spain
- Pembroke College, Cambridge
- Pembroke College, Oxford
- Pennsylvania Hospital, Philadelphia
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- Peterhouse, Cambridge
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- The Pierpont Morgan Library
- Robert S. Pirie, New York
- Plume Library, Maldon
- Plymouth Proprietary Library
- Princeton
- Private owners in the UK
- Privately owned in the USA
- The Queen's College, Oxford
- Queeen's University of Belfast
- Professor John A. Rea
- Rhode Island Historical Society
- Riveredge Foundation, Calgary, Canada
- Professor Roots, Exeter
- The Rosenbach Museum & Library, numbers 1 through 239
- The Rosenbach Museum & Library, numbers 1000 through end
- The Rosenbach Museum & Library, numbers 240 through 999
- Royal College of Music
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- Royal Irish Academy
- Royal Library, Copenhagen
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- Royal Library, Windsor
- Royal Society, London
- Rutgers State University
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- Saffron Walden Museum
- Salisbury Cathedral
- The Marquess of Salisbury, Hatfield House
- Saltykov-Shchedrin State Public Library, St Petersburg, Russia
- Sandon Hall Archives, Stafford
- James Schaffner, Toronto
- Shakespeare Birthplace Trust Record Office
- Sheffield Archives
- Sherborne Castle
- Shrewsbury Library
- Shrewsbury School
- Shropshire Archives
- Sidney Sussex College, Cambridge
- Sizergh Castle
- Smith College
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- Society of Antiquaries
- Somerset Heritage Centre
- St Catharine's College
- St John's College, Cambridge
- St John's College, Oxford
- St Paul's Cathedral
- Staatsbibliothek, Berlin
- Stadtbibliothek Vadiana, St Gallen, Switzerland
- Stafford Borough Council, Izaak Walton Cottage Trust
- Staffordshire Record Office
- Stanford University Library
- State Historical Museum, Moscow
- Stationers' Company Archives, London
- Stonyhurst College
- Suffolk Record Office, Bury St Edmunds
- Suffolk Record Office
- Suffolk Record Office, Lowestoft
- Surrey History Centre, Woking
- The Duke of Sutherland
- Syracuse University, Special Collections Research Center
- Professor Toshiyuki Takamiya
- Charles Tanenbaum, New York
- Texas A&M University
- Texas Tech University, Lubbock
- The Laird of Traquair, Traquair House
- Trinity College, Cambridge
- Trinity College, Dublin, numbers 1 through 199
- Trinity College, Dublin, numbers 200 through 799
- Trinity College, Dublin, numbers 800 through end
- Trinity College, Dublin, Early Printed Books
- Trinity College, Hartford
- Trinity College, Oxford
- Trinity House, Hull
- Alexander Turnbull Library
- United States Air Force Academy
- University of Arizona, Tucson
- University College London
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- Untraced, Abel Berland Collection
- Untraced Bright MSS
- Untraced Dobell MSS
- Untraced, miscellaneous
- Untraced, Phillipps MS
- Untraced Tixal MSS
- David Vaisey
- Vatican Archives
- Vatican Library
- Sir Ralph Verney, Bt., Claydon House
- Arthur E. Vershbow
- Sir Brian Vickers, London
- Victoria and Albert Museum
- Virginia Historical Society
- Wadham College, Oxford
- Mr Richard Waller
- Warwickshire County Record Office
- George Watson
- Wellcome Library, London
- Wellesley College
- Wells Cathedral
- West Sussex Record Office
- Westminster Abbey
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- Duke of Westminster, Eaton Estate Office
- Westminster School
- Wilberforce House Museum, Hull
- William Salt Library, Stafford
- Williams College
- Dr Williams's Library
- Rosemary Williams
- Wiltshire and Swindon Archives
- Winchester College
- John Wolfson, New York
- Worcester College, Oxford
- Worcestershire Record Office
- Wormsley Library
- Yale Music Library
- Yale, Osborn MS b 1 through Osborn MS b 49
- Yale, Osborn MS b 100 through Osborn MS b 149
- Yale, Osborn MS b 150 through Osborn MS b 199
- Yale, Osborn MS b 200 through end
- Yale, Osborn MS b 50 through Osborn MS b 99
- Yale, Osborn, others
- Yale
- York Minster
- Yorkshire Archaeological Society, Leeds
- Zentralbibliothek, Zürich, Switzerland