This collection consists largely of letters from Roger Casement to Captain Hans Boehm, during Casement's stay in Germany in 1915, as well as some associated material (photographs, medals) relating to his first contact with the German authorities in November and December 1914 and the formation of the Irish Brigade in 1915.

Correspondence relating to O'Curry's work with the Ordnance Survey and the Royal Irish Academy and general correspondence on antiquarian, genealogical, linguistic and literary matters; correspondence as Professor of Archaeology and Ancient Irish History in the Catholic University, mainly concerning his academic and research interests; some personal correspondence, and personal financial and family documents.

Correspondence relating to Fr Luke Wadding OFM and the Irish Friars Minor at St. Isidore’s College, Rome, on ecclesiastical and political matters; and concerning his interests as historian of the Franciscan Order.

Letters from correspondents primarily in the British Isles, but also from North America and the Middle East, encompassing a wide range of antiquarian concerns including archaeological finds, anatomy, sigillography, topography, numismatics, and Frazer's collection of autographs and prints.

Correspondence between John O'Donovan (1809-1861), and, principally, William Reeves (1815-1892): eighty letters (1832-1860) and twenty-six undated note fragments.

The Irish Virtual Research Library and Archive (IVRLA) is a digitisation project launched in UCD in January 2005. The project was conceived as a means to increase and facilitate access to UCD's cultural heritage repositories through the adoption of digitisation technologies.

[Letter from Tomás de Bhaldraithe to Miss Fionnuala Duane (4 Richmond House, Richmond Hill, Monkstown, Blackrock, Co. Dublin), giving an initial opinion on the Ó Dálaigh manuscript.]

[Letter from Fionnuala Duane (23 Eaton Square, Monkstown, Blackrock, Co. Dublin) to Professor [Tomás de Bhaldraithe], discussing a recent book by de Bhaldraithe; and informing him of letters written by Seán Ó Dálaigh to her father.]

[Letter from Marion Gunn (Seomra C215, Áras J. H. Newman, An Coláiste Ollscoile, Baile Átha Cliath 4) to Fionnuala Duane (4 Richmond House, Richmond Hill, Monkstown, Blackrock, Co. Dublin), enquiring about letters written by Seán Ó Dálaigh to Duane's father.]

[Copy letter from Séan Ó Dálaigh (Dún Chuinn) to an unidentified recipient.]

The Irish Virtual Research Library and Archive (IVRLA) is a digitisation project launched in UCD in January 2005. The project was conceived as a means to increase and facilitate access to UCD’s cultural heritage repositories through the adoption of digitisation technologies.

[Letter from J. O'Donnell, ('Prague', Newcastle Park, Galway) to [the Irish Folklore Commission], apologising for not being able to supply any worth-while information for the questionnaire on Tinkers.]

[Information collected from various unidentified people in the area around Kiltyclogher, by Lorcán Ó Rúanaidhe, Corrán Mór, Kiltyclogher, Co. Leitrim.]

[Response from Mrs. Anne Bannon, Abbeyshrule, Co. Longford, collected by Philip Hedwith, Ballycloghan, Carrickboy, Co. Longford.]

[Information collected by Margaret Steveley from members of the Cahir Guild of the Irish Countrywomen's Association, Carrigeen, Cahir, Co. Tipperary.]

[Letter from Seán O'Casey (Rathconrath, Co. Westmeath) to Seán [Ó Súilleabháin], concerning the questionnaire on Tinkers, which Ned Buckley has forwarded on his behalf.]

[Response from Kate Manning, 74 Leinster Road, Rathmines, Dublin.]

[Letter from Patrick Lyons (Post Office Lane, Clonmel, Co. Tipperary) to Sea´n Ó Su´illeabha´in, providing further information for the questionnaire on Tinkers.]

[Letter from Patrick Lyons (Post Office Lane, Clonmel, Co. Tipperary) to the Irish Folklore Commission, providing further information for the questionnaire on Tinkers.]

[Response from Cáit Uí Chonchubhair (Cáit Rua), Delvin, Co. Westmeath, collected by Siobhán Nic Shiomóin, Delvin, Co. Westmeath.]

[Response from Michael S. Meany, Tulla, Co. Clare.]

[Response from Michael Martyn, Dromeilithe, Co. Clare, collected by [Margaret Josephine ?] Martyn, Principal, Girls' School, Cooraclare, Co. Clare.]

[Letter from Eamonn Delaney (Thomastown, Golden, Co. Tipperary) to Seán Ó Súilleabháin, containing information for the questionnaire on Tinkers.]

[Response from J. S. Hamilton, Brownhall, Ballintra, Co. Donegal.]

[Letter from S. S. Henderson to [the Irish Folklore Commission], returning the 'enclosed' and informing the recipient of her husband's death.]

[Letter from Gwen D. Thorpe, (Altikeeragh, Castlerock, Co. Londonderry, N. Ireland) to the [Irish Folklore Commission], returning the uncompleted questionnaire on Tinkers.]

[Response from Patrick McCullagh, Currainalt, and various other unidentified people, collected by Michael J. Murphy, Glenhull, Omagh, Co. Tyrone.]

[Information collected from various unidentified people by Philip O'Connell (Pilib Ó Conaill), Lower Main Street, Kilfinnane, Co. Limerick.]

[Response from Seán Ó Dúbhda, Carraig, Ballynagall, Dingle, Co. Kerry.]

[Letter from Dáithí Ó Ceanntúil (David Cantwell), (Croom, Co. Limerick) to Seán Ó Súilleabháin, enclosing a newscutting of an article entitled 'To quit caravan'.]

[Response from Patrick Barry, Mondaniel, Rathcormac, Co. Cork.]

[Response from Seán Ó Beirn (John Byrne), Malin, Co. Donegal.]

[Response from Stiophán Mac Philib, Emyvale, Co. Monaghan.]

[Letter from P. J. Fleming (Countess Road, Killarney) to Seán Ó Súilleabháin (Archivist, University College, Dublin), giving his opinion on the 'Tinker Tribe'.]

[Response from Máire Bean Uí Urdáil (Mary Harrington), Eyeries, Beara, Co. Cork.]

[Letter from Bill Cantwell (St. Augustine's College, Dungarvan, Co. Waterford) to his father, David Cantwell, concerning the collection of information for the Irish Folklore Commission's survey on Tinkers.]

[Response from Ciarán Ó Síothcháin, Clear Island, Co. Cork.]

[Response from Máire Ní Bhrian, Drishaghaun, Co. Galway, collected by Eibhlín Ní Cháirr, Drishaghaun, Cloonbur, Co. Galway.]

[Draft letter from Eugene O'Curry (2 Portland Street North, Dublin) to Rev. Philip Fitzgerald, concerning Irish poetry.]

[Copy of a letter from Eugene O'Curry (2 Portland Street North) to A. W. Barnett, concerning the erection of a monument to [John] Lanigan; and the skirmish between the 'Waterford Citizen' and the 'Irishman'.]

[Draft letter from Eugene O'Curry to William Lane Joynt, concerning a lecture to be given by Joynt.]

[Draft letter from Eugene O'Curry to Rev. Harry Longueville Jones, accepting the status of honorary member of the Cambrian Archaeological Association.]

[Draft letter from Eugene O'Curry to an unnamed correspondent, commenting on his poetry.]

[Draft letter from Eugene O'Curry, praising the unnamed recipient's ability to write the history of Limerick.]

[Letter from [Jeremiah] Molony (Rosscarbery, Co. Cork) to Eugene O'Curry, requesting information on ecclesiastical history.]

[Letter from Mathew Dawes (Westbrooke, Bolton, England) to Eugene O'Curry, concerning research into his family tree.]

[Letter from Mathew Dawes (Westbrooke, Bolton, England) to Eugene O'Curry, concerning research into his family tree.]

[Letter from John O'Daly (9 Anglesea Street) to Eugene O'Curry, discussing a transcription of a fairy lullaby entitled 'An Seoithin'.]