Manuscript Repositories
- (+) Private, n/a
- (+) (Lost or missing), n/a
- (+) Abbotsford House, Abbotsford (Roxburghshire)
- (+) Alnwick, Alnwick, Northumberland
- (+) Archivio segreto vaticano, Città del Vaticano
- (+) Archivo General, Simancas (Valladolid)
- (+) AVCAU, Rome
- (+) Armagh Robinson Library, Armagh
- (+) Badische Landesbibliothek, Karlsruhe
- (+) Bayerische Staatsbibliothek, München
- (+) Farmleigh, Farmleigh House, Dublin
- (+) Biblioteca Ambrosiana, Milano
- (+) Biblioteca Antoniana, Padova
- (+) Biblioteca apostolica vaticana, Città del Vaticano
- (+) Biblioteca Comunale degli Intronati, Siena
- (+) Biblioteca Medicea Laurenziana, Firenze
- (+) Biblioteca Nazionale, Torino
- (+) Bibliotheek der Rijksuniversiteit, Leiden
- (+) Bibliothèque Mazarine, Paris
- (+) Bibliothèque municipale, Angers (Maine-et-Loire)
- (+) Bibliothèque municipale, Laon
- (+) Bibliothèque municipale, Rennes
- (+) Orléans, Orléans
- (+) Bibliothèque nationale de Luxembourg, Luxembourg
- (+) BNF, Paris
- (+) Bibliothèque royale de Belgique, Bruxelles
- (+) Bodleian Library, Oxford
- (+) Bolton, Cashel, Co. Tipperary
- (+) BPL, Boston, MA
- (+) British Library, London
- (+) Burgerbibliothek, Bern
- (+) Cashel Library, Cashel, Co. Tipperary
- (+) Cathedral Library, Salisbury
- (+) Veech Library, Sydney, Sydney
- (+) Chatsworth House, Chatsworth, Derbyshire
- (+) Clonalis House, Castlerea, Co. Roscommon
- (+) Coláiste na Rinne, Rinn ó gCuanach (Co. Phort Láirge)
- (+) Cork Archives Institute, Cork
- (+) Corpus Christi College, Oxford
- (+) Corpus Christi College, Cambridge
- (+) Dunvegan Castle, Dunvegan, Isle of Skye
- (+) University Library, Edinburgh
- (+) Emmanuel, Cambridge
- (+) Villanova, Villanova, PA
- (+) Fitzwilliam, Cambridge
- (+) Glasgow University Library, Glasgow
- (+) Gonville and Caius College, Cambridge
- (+) Harvard University Library, Cambridge, MA
- (+) Huntington, San Marino, CA
- (+) Fulda, Fulda
- (+) Irish Folklore Collection, Dublin
- (+) Jesuit Archives, Dublin
- (+) Jesus College Library, Oxford
- (+) Boston College, Chestnut Hill, MA
- (+) Rylands Library, Manchester
- (+) King’s Inns Library, Dublin
- (+) Kongelige Bibliotek, København
- (+) Kungliga Biblioteket, Stockholm
- (+) Lambeth Palace Library, London
- (+) Hatfield House, Hatfield House, Hertfordshire
- (+) Manx Museum, Douglas
- (+) Marsh’s Library, Dublin
- (+) Maryland, Baltimore, MD
- (+) Médiathèque Municipale, Cambrai
- (+) Mitchell, Sydney
- (+) Mount Melleray Abbey, Melleray, Co. Waterford
- (+) Mount St. Joseph Abbey, Roscrea
- (+) Mullingar, Mullingar
- (+) NLI, Dublin
- (+) NLS, Edinburgh
- (+) NLW, Aberystwyth
- (+) NMI, Dublin
- (+) NMS, Edinburgh
- (+) New Norcia, New Norcia, W. A.
- (+) Norfolk Record Office, Norfolk
- (+) Nova Scotia Archives, Halifax, NS
- (+) Österreichische Nationalbibliothek, Vienna
- (+) Pearse Street Library, Dublin
- (+) Pierpont Morgan Library, New York
- (+) Public Library, Belfast
- (+) Queen’s University Library, Belfast
- (+) NLR, Sankt-Peterburg
- (+) RIA, Dublin
- (+) Russell Library, Maynooth
- (+) Saint John’s College, Waterford
- (+) School of Celtic Studies, Dublin
- (−) Schøyen Collection, Oslo and London
- (+) Sheffield, Sheffield
- (+) St. Colman’s, Fermoy, Co. Cork
- (+) St. John’s College Library, Oxford
- (+) St. John’s College, Cambridge
- (+) Kilkenny, Kilkenny
- (+) Stadtbibliothek Schaffhausen, Schaffhausen (Switzerland)
- (+) Stadtbibliothek, Leipzig
- (+) Stiftsbibliothek Einsiedeln, Einsiedeln
- (+) Stiftsbibliothek Klosterneuburg, Klosterneuburg
- (+) Stiftsbibliothek Sankt Gallen, Sankt Gallen (Switzerland)
- (+) Stiftsbibliothek St. Paul, Sankt Paul im Lavanttal (Austria)
- (+) Stirling, Stirling
- (+) Stonyhurst, Clitheroe, Lancashire
- (+) NAI, Dublin
- (+) TNA:PRO, London
- (+) RHASS, Ingliston
- (+) TCD, Dublin
- (+) TCC, Cambridge
- (+) Universitätsbibliothek, Würzburg
- (+) Universitätsbibliothek, Augsburg
- (+) Universitätsbibliothek, Leipzig
- (+) UCD, Dublin
- (+) University College, Oxford
- (+) UCC, Cork
- (+) UCG, Galway
- (+) UCD-OFM, Dublin
- (+) Cambridge University, Cambridge
- (+) University of Wisconsin-Madison, Madison, WI
- (+) West Highland Museum, Fort William
- (+) Zentralbibliothek, Zürich