| "Black Bob" Craufurd and Ireland, 1798-1804 | Durey, Michael J. | Article in Journal | | 2009 |
| "From motives of generousity as well as self-preservation" : Thomas Branagan, colonization, and the gradual emancipation movement | Tomek, Beverly | Article in Journal | | 2005 |
| "Greatly benefited" : the history of the borough school Swords, Co. Dublin, 1804-2000 | Whiteside, Andrew | Monograph or Collective Volume | Governors of the Old Borough School | 2000 |
| "How did they pass the Union?" : Secret Service expenditure in Ireland 1799-1804 | Wilkinson, David | Article in Journal | | 1997 |
| "Put one Irishman on a spit and another will turn him": a postrevolutionary episode in South Carlow, 1804 | Patterson, James G. | Article in Journal | | 2018 |
| "The noblest offering that nation ever made to nation" : American philanthropy and the Great Famine in Ireland | Geary, Laurence M. | Article in Journal | | 2013 |
| "The perverted graduates of Oxford" : Priestcraft, "Political Popery" and the transnational anti-Catholicism of Sir James Emerson Tennent | Wright, Jonathan Jeffrey | Article in Book | Routledge | 2014 |
| "Underhand Dealings with the Papal Authorities" : Disraeli and the Liberal Conspiracy to Disestablish the Irish Church | Kennedy, Padraic C. | Article in Journal | | 2008 |
| "Unfurling the banner of reform" : public opinion, nationalism, and Facts and Figures from Italy | Dunne, Fergus | Article in Journal | | 2009 |
| 'An Eel is not more slippery than an Irish Gentleman': managing a jointly held estate in Cork and Dublin, 1778-1845 | Johnstone, Laura | Article in Journal | | 2019 |
| 'An unknown Irishman': Jeremiah Hodges Mulcahy reconsidered | Casey, Edel | Article in Journal | | 2006 |
| 'Due North' talks to Jonathan Bardon author, historian and chairman of the Community Relations Council | Bardon, Jonathan | Article in Journal | | 2000 |
| 'In very good business': Andrew Callnan's house-decorating business, 1790-1804 | Lucey, Conor | Article in Journal | | 2007 |
| 'Liberty or death' : the United Irishmen in New South Wales, 1800-4 | O'Donnell, Ruán | Article in Book | | 2003 |
| 'Like Maginn, a Corcagian' : bad company for D. Maclise | McCarthy, Thomas | Article in Book | | 2012 |
| 'So grand on ....' | Kiely, Benedict | Article in Journal | | 1946 |
| 'The independent expression of public opinion' : the Paris correspondence of Francis Sylvester Mahony | Dunne, Fergus | Article in Journal | | 2007 |
| 'You may be young enough to live, but you are old enough to die' : life and death in the sermons of James Gallagher, William Gahan and Silvester Goonan | Mac Murchaidh, Ciarán | Article in Book | | 2016 |
| 1878 - those were the days | McConville, Sinéad | Article in Journal | | 1987 |
| A bridge in a field | Langan, PaulineMarks, Bernadette | Article in Journal | | 2011 |
| A city in civil war : Dublin, 1921-4 | Yeates, Pádraig | Monograph or Collective Volume | Gill & Macmillan | 2015 |
| A colony of strangers : the founding and early history of Clifden | Villiers-Tuthill, Kathleen | Monograph or Collective Volume | Clifden Girl Publications | 2012 |
| A fine place to daydream : racehorses, romance and the Irish | Barich, Bill | Monograph or Collective Volume | Willow | 2005 |
| A history of the diocese of Cork : the episcopate of William Delany : 1847-1886 | Bolster, Evelyn | Monograph or Collective Volume | Tower Books | 1993 |
| A note on the archives of the Department of Foreign Affairs | Chambers, Bernadette | Article in Journal | | 1995 |
| A note on the gate of the "Factory" at Maynooth | Horner, Arnold | Article in Journal | | 2004 |
| A Redemptorist missionary in Ireland, 1851-1854 : memoirs by Joseph Prost, C.SS.R. | Freudenberger, HermanLarkin, EmmetProst, Joseph | Monograph or Collective Volume | Cork University Press | 1998 |
| A Redemptorist missionary in Ireland, 1851-1854 : memoirs by Joseph Prost, CSsR | | Monograph or Collective Volume | Cork University Press | 1998 |
| A treatise on impressing, 1804 | Hamilton, AlexanderOsborough, W. N. (William Nial) | Article in Journal | | 1973 |
| Alexander Nixon of Heathfield, Ballyboes | Ó Ceallaigh, Seosamh | Article in Journal | | 2019 |
| Alphabetical Register of all the authors actually living in Great-Britain, Ireland and in the United Provinces of North-America, ... Supplement and continuation for 1790 to 1803. - Das gelechrte England, etc. | Reuss, J. D. | Monograph or Collective Volume | | 1791 |
| American vistas : 1877 to the present | | Monograph or Collective Volume | Oxford University Press | 1971 |
| An efficacious Irish triumvirate : Paul Cullen, Tobias Kirby and Joseph Dixon | McKinney, Amy | Article in Book | | 2008 |
| An Gorta Mór (the great famine) scourge of Ireland | Moran, John | Article in Journal | | 1995 |
| An ogam-inscribed stone in Ballintaggart | Devane, Caitríona | Article in Journal | | 2001 |
| An overview of sport in Tullamore: the 1960s | Corrigan, Kevin | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Andrew Nicholl and his patrons in Ireland and Ceylon | Anglesea, Martyn | Article in Journal | | 1982 |
| Andrew Nicholl and his patrons in Ireland and Ceylon | Angelsea, Martyn | Article in Journal | | 1982 |
| Annals of Dun Leary-Kingstown | McGovern, Michael | Article in Journal | | 1995 |
| Ardkeen House | Grogan, Pat | Article in Journal | | 2013 |
| Aristocratic funeral rituals and the death of Irish landlordism | Dooley, Terence | Article in Book | | 2016 |
| Athletics and cycling (in Mallow) | Power, Con | Article in Journal | | 1984 |
| Bandon and the baleful conspiracy | Lane, Pádraig G. | Article in Journal | | 2012 |
| Bandon, brethern and Broghill | Lane, Padraig G. | Article in Journal | | 2011 |
| Bandon, fiction and the historic moment. "Black Monday Insurrection" by John Elmes | Lane, Pádraig G. | Article in Journal | | 2010 |
| Bandon, the O'Mahonys and a forgotten writer | Lane, Padraig G. | Article in Journal | | 2009 |
| Banking and Insurance in Tullamore since the 1960s | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Benjamin Disraeli | Shillman, Bernard | Article in Journal | | 1941 |
| Bishop Michael Power of Toronto (1804-1847) : a reluctant hero | McGowan, Mark G. | Article in Book | | 2021 |
| British politics in the 19th century | NA | Monograph or Collective Volume | NA | 1970 |
| Bronterre : a political biography of Bronterre O'Brien, 1804-64 | Plummer, Alfred | Monograph or Collective Volume | Allen & Unwin | 1971 |
| Burke & Hare | Edwards, Owen Dudley | Monograph or Collective Volume | | 1980 |
| Burke in Belfast : Thomas MacKnight, Gladstone and Liberal Unionism | Maume, Patrick | Article in Book | | 2010 |
| Burns’ associations with county Louth | Ross, Noel | Article in Journal | | 1995 |
| Captain Robert Bennet Forbes (1804-1889) and his voyage of mercy to Ireland | Shannon, Catherine | Article in Book | NA | 2021 |
| Carlow - the provincial leader in a Gaelic revival | Purcell, Michael | Article in Journal | | 1983 |
| Castle Curious, Shanballymore, Co. Cork | Murphy, Damian | Article in Journal | | 2024 |
| Castle Hill and Vinegar Hill : the Australian Rising of 1804 | O'Donnell, Ruán | Article in Journal | | 2004 |
| Chartism and Irish nationalism, 1829-48 : Bronterre O'Brien, the London Irish and attempts at a Chartist-Irish alliance. | Koseki, Takashi | Thesis | | 1988 |
| Christ Church, Derriaghy : gravestone and church inscriptions. | Barr, W. N. C., Rev. | Monograph or Collective Volume | W. N. C. Barr | 2002 |
| Clough United Irishman excecuted in Australia | Hume, Harry | Article in Journal | | 2010 |
| Colourful Corkman | O'Cahill, Donal | Article in Journal | | 1944 |
| Conflict, politics and patronage in late eighteenth century Armagh: a study of the correspondence of Edward Hudson, Church of Ireland Minister, Forkhill, 1789-1795 | Behan, Janine Elaine | Article in Journal | | 2016 |
| Cork and the Carnivalesque : Francis Sylvester Mahony (Fr. Prout) | Eagleton, Terry | Article in Journal | | 1996 |
| Cork imprints of Catholic historical interest 1723-1804 : a provisional check-list | Fenning, Hugh | Article in Journal | | 1995 |
| Correspondence of Emily, Duchess of Leinster (1731-1814). Vol. 1, Letters of Emily, Duchess of Leinster, 1731-1814; James, 1st Duke of Leinster; Caroline Fox, Lady Holland; vol. 2, Letters of Lord Edward Fitzgerald and Lady Sarah Napier (née Lennox); vol. 3, Letters of Lady Louisa Conolly and William, marquis of Kildare (2nd duke of Leinster) | | Monograph or Collective Volume | The Stationery Office [for the Irish Manuscripts Commission] | 1957 |
| Cruelty and sensibility: Emotions in women's narratives written during the United Irish Rebellion of 1798 | Ruberg, Willemijn | Article in Journal | | 2010 |
| Curing the "social body" in 1832 : James Phillips Kay and the Irish in Manchester | Poovey, Mary | Article in Journal | | 1993 |
| Dancing Days in Tullamore since the 1960s: From the marquee to the nightclub | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Daniel Cullinmore (1804-1889) | Curtis, Rita | Article in Journal | | 1999 |
| Daniel Cullinmore's charity | Curtis, Rita | Article in Journal | | 1999 |
| David Ross of Bladensburg : a nineteenth century Ulsterman in the Mediterranean | Whitehead, David | Article in Journal | | 1998 |
| Democracy and world conflict, 1868-1962 : a history of modern Britain | Jarman, T. L. | Monograph or Collective Volume | NA | 1963 |
| Denver - a soldier, lawyer, editor | Croskery, Eithne | Article in Journal | | 1987 |
| Descriptive catalogue of materials relating to the history of Great Britain and Ireland to the end of the reign of Henry VII, vol. 1, pt. 1 : Roman period to 750; vol. 1, pt. 2 : 750-1066, with a list of printed materials for British medieval history, including the publications of societies and official bodies and works relating to matters subsequent to 1485; vol. 2 : 1066-1200; vol. 3 : 1200-1327, with facsimiles of the handwriting of Matthew Paris and appendices relating to the early printed editions of Matthew of Westminster and Roger of Wendover. 3 vols. in 4 | Hardy, Thomas Duffus, Sir, 1804-1878 | Monograph or Collective Volume | | 1862 |
| Disraeli, the Conservatives and the government of Ireland : part 1, 1837-1868 | Warren, Allen | Article in Journal | | 1999 |
| Disraeli, the Conservatives and the government of Ireland : Part 2, 1868-1881 | Warren, Allen | Article in Journal | | 1999 |
| Divisions of labour: Inter-managerial conflict among the Wentworth-Fitzwilliam Agents | Byrne, Fidelma | Article in Book | | 2018 |
| Documents relating to Ireland (1795-1804) : official account of secret service money. Governmental correspondence and papers. Notice of French soldiery at Killala. Statements by United Irishmen. Letters on legislative union with Great Britain, etc. | | Monograph or Collective Volume | | 1893 |
| Documents relating to Ireland, 1795-1804 | | Monograph or Collective Volume | Irish University Press | 1970 |
| Dr. J. A. O'Keefe : Irish mediator of Kantian philosophy - life, work and legacy | Class, Monika | Article in Journal | | 2007 |
| Dublin Diocesan archives : Murray papers (4) | Purcell, Mary | Article in Journal | | 1984 |
| England, Ireland and America | [Cobden, Richard, 1804-1865] | Monograph or Collective Volume | | 1835 |
| Enhancing a precious legacy : County Meath Heritage Plan | Mac Gabhann, Séamus | Article in Journal | | 2007 |
| Essay on the population of Dublin, being the result of an actual survey taken in 1798 ... to which is added the general return ... in 1804 | Whitelaw, James | Monograph or Collective Volume | | 1805 |
| Extracts from a Ratoath diary, 1804-98 | Mulvany, Peter | Article in Journal | | 1975 |
| Extracts from the State of the Country Papers, 1804-1830 | O'Reilly, Vincent | Article in Journal | | 1999 |
| F.S. Oliver, Alexander Hamilton, and the "American Plan" for resolving Britain's constitutional crises, 1903-1921 | Fair, John D. | Article in Journal | | 1999 |
| Fergus O'Connor and J. Bronterre O'Brien | Briggs, Asa | Article in Book | | 1966 |
| Fr. Philip Roche, commander-in-chief : the life and times of a '98 rebel priest before, during and after the rebellion | | Monograph or Collective Volume | Rather Ainnish Publications | 1998 |
| Fragments, politics and "The Bells of Shandon" | Dunne, Fergus | Article in Journal | | 2006 |
| Free labour and 'whitening' the nation : Irish migrants in colonial Cuba | Brehony, Margaret | Article in Journal | | 2013 |
| Geography of production linkages in the Irish and Scottish microcomputer industry : the role of logistics | Jacobson, DavidVan Egeraat, Chris | Article in Journal | | 2005 |
| George Barrington | McGahan, John | Article in Journal | | 1942 |
| Gladstone and Disraeli. | Abbott, B. H. | Monograph or Collective Volume | NA | 1972 |
| Greatly Benefited: The History of the Borough School, Swords 1804-2000 | Whiteside, Andrew | Monograph or Collective Volume | Governors of the Old Borough Schoo | 2000 |
| Hawthorne and the "Wild Irish" : a note | Singer, David | Article in Journal | | 1969 |
| History of Motor and Farm Machinery Garages in Tullamore, 1960–2013 | Colton, Ronnie | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Ireland and Irishness in the political thought of Bronterre O'Brien | Turner, Michael J. | Article in Journal | | 2014 |
| Ireland in 1804 | | Monograph or Collective Volume | Four Courts | 1980 |
| Irish famine relief in the early 19th century | Royle, Stephen A. (Stephen Arthur) | Article in Journal | | 1984 |
| Irish literature in English : the romantic period (1789-1850) | Rafroidi, Patrick | Monograph or Collective Volume | [s.n.] | 1972 |
| James Bronterre O'Brien : a forgotten radical | Kelly, James, 1959- | Article in Journal | | 1978 |
| Jim Larkin | Plunkett, James, 1920-2003 | Article in Book | | 1966 |
| Joe Howe and the Irish | Punch, Terence M. | Article in Journal | | 1982 |
| John Bright and the Empire | Sturgis, James Laverne | Monograph or Collective Volume | | 1969 |
| John Ferrar's Limerick City Directory - 1788 | Murphy, Charlotte | Article in Journal | | 2009 |
| John Ferrar, 1742-1804 : printer, author and public man | Moore, Jennifer | Article in Book | | 2009 |
| Joseph Napier and the Irish Land bills of 1852 | Shields, Andrew | Article in Journal | | 2009 |
| Kilkenny : the G.A.A. story 1884-1984 | Ryall, Tom | Monograph or Collective Volume | Kilkenny County G.A.A. Board | 1984 |
| La question d'Irlande | Guiffan, Jean | Monograph or Collective Volume | Editions Complexes | 2006 |
| Leitrim and the croppies 1776-1804 | Mac Atasney, Gerard | Monograph or Collective Volume | Carrick-on-Shannon and District Historical Society | 1998 |
| Letters back to Ballymena & district : part 1 : insights into the emigrant experience 1804-1902 | | Monograph or Collective Volume | Cambridge House Boys' Grammar School | 1991 |
| Lord Kildare's grand tour : the letters of William Fitzgerald, 1766-1769 | FitzGerald, Elizabeth | Monograph or Collective Volume | Collins | 2000 |
| Love, loss and learning in late Georgian Belfast : the case of Eliza McCracken | Wright, Jonathan Jeffrey | Article in Book | | 2016 |
| Lt Edward Hepenstall - the walking gallows. Parts 1-2 | O'Reilly, Vincent | Article in Journal | | 1996 |
| Lydia Shackleton 1828-1914, botanist and artist | Lahert, HelenScannell, Mary J. P. | Article in Journal | | 1983 |
| Madame Tussaud in Dublin, 1804-1808 | Grogan, Mary | Article in Journal | | 1999 |
| Marmion Wilme Savage, 1804-1872 : Dublin's Victorian satirist | Norman, Paralee | Monograph or Collective Volume | Edwin Mellen Press | 2000 |
| Marriage licences from the diocese of Ossory 1739-1804 | Refaussé, Raymond | Article in Journal | | 1992 |
| Martello Tower No 10, Shenick's Island, Skerries, Co. Dublin | Whearity, Peter F. | Article in Journal | | 2006 |
| Masters of Irish music | Gaul, Liam | Monograph or Collective Volume | Nonsuch | 2006 |
| McManus Jewellers, 92 Lr. Georges St. | Scudds, Colin | Article in Journal | | 2006 |
| Minorca and Ireland - an architectural connection : the Martello towers of Dublin Bay | Kerrigan, Paul M. | Article in Journal | | 1983 |
| Miscellanea, some features uncovered at Seapoint Martello Tower, Co. Dublin | Corlett, Christiaan | Article in Journal | | 2001 |
| Miscellanea. 1. Ecumenism and homeopathy in nineteenth-century Rome: an Irish tragedy | Mac Craith, Mícheál | Article in Journal | | 2015 |
| Miscellany : Minister réabhlóideach a chaith tréimhse i gCluain Meala : Seán Ua Cearnaigh | Ua Cearnaigh, Seán | Article in Journal | | 2002 |
| Mr Howis, the artist of Jervis Street 1804-1882 | Brooke-Tyrrell, Alma | Article in Journal | | 1998 |
| Mr William Cope's petition, 1804 : a hitherto unpublished state paper | | Article in Journal | | 1943 |
| Mrs Paterson's keepsakes : the provenance of some significant colonial documents and paintings | Whitaker, Anne-Maree | Article in Journal | | 2004 |
| Nineteenth-century travellers to Early Christian Sites in Co. Kerry | Okasha, Elisabeth | Article in Book | | 2007 |
| Notes of Bishop William Delany and John Lawlor, sculptor | Hamilton, Pádraig | Article in Journal | | 2020 |
| Notes towards an early history of Spicers of Navan | Whearity, Frank | Article in Journal | | 2023 |
| Observations upon the state of the currency in Ireland. | Parnell, H. B. | Monograph or Collective Volume | | 1804 |
| Opera with an Irish Ring | Allen, John | Article in Journal | | 2007 |
| Optics after Newton : theories of light in Britain and Ireland, 1704-1840 | Cantor, Geoffrey N. | Monograph or Collective Volume | NA | 1983 |
| Peerage creations : chronological lists of creations in the peerages of England and Great Britain,1649-1800, and of Ireland, 1603-1898 | | Monograph or Collective Volume | Wiley-Blackwell for the Parliamentary History Yearbook Trust | 2008 |
| Philip's 19th century atlas of Ireland | Blackwell, JohnBlackwell, StanleyLawnie, C. C.Philip, George | Monograph or Collective Volume | Clancy Press | 1984 |
| Plentiful Country: The Great Potato Famine and the Making of Irish New York | Anbinder, Tyler | Monograph or Collective Volume | Eriu | 2024 |
| Pre-Famine fever epidemics : a case study of the Cork Street Fever Hospital, Dublin | McCabe, Ciarán | Monograph or Collective Volume | Four Courts Press | 2025 |
| Printing Carton : the 2nd Duke of Leinster, Thomas Roberts and William Ashford | Laffan, WilliamRooney, Brendan | Article in Book | | 2014 |
| Prout and plagiarism | Eagleton, Terry | Article in Book | | 1998 |
| Provision for the poor in the pre-famine era | MacAtasney, Gerard | Article in Book | | 2001 |
| Radicalism and reputation : the career of Bronterre O'Brien | Turner, Michael J. | Monograph or Collective Volume | Michigan State University Press | 2017 |
| Rational choice and British politics : an analysis of rhetoric and manipulation from Peel to Blair | McLean, Iain | Monograph or Collective Volume | Oxford University Press | 2001 |
| Reassessing the Irish pound report of 1804 | Ó Gráda, Cormac | Monograph or Collective Volume | Department of Political Economy | 1989 |
| Reassessing the Irish Pound Report of 1804 | Ó Gráda, Cormac | Article in Journal | | 1991 |
| Register of the Cathedral of St FinBarre's, Cork, 1753-1804 | | Monograph or Collective Volume | Representative Church Body Library | 2008 |
| Remarkable, but still true : the story of the Revd R J Barlow and Hutton Rudby in the time of the cholera | Barrigan, Alice | Monograph or Collective Volume | Westgate Publishing | 2007 |
| Reminders of the City of Dublin Steam Packet Company at Holyhead | Owen, John Roger | Article in Journal | | 2005 |
| Report to the Right Honourable the Master of the Rolls upon the Carte and Carew papers in the Bodleian and Lambeth libraries | Brewer, J. S.Hardy, Thomas Duffus, Sir, 1804-1878 | Monograph or Collective Volume | | 1864 |
| Republicanism, agrarianism and banditry in the west of Ireland, 1798-1803 | Patterson, James G. | Article in Journal | | 2006 |
| Rev. Richard Dell, M.A., (c.1804-1858) and Magee College | Roberts, Alan | Article in Journal | | 1993 |
| Review article. Inland waterways as a military theme | Ferguson, Kenneth | Article in Journal | | 2018 |
| Richard Griffith and the first published geological map of Ireland | Archer, J. B. | Article in Book | | 1980 |
| River Shannon bridge, Sligo line | Doyle, Oliver | Article in Journal | | 2010 |
| Robert Baldwin : symbol of political moderation | Senior, Hereward | Article in Book | | 1988 |
| Salts/Tullamore Yarns, 1938–82: the largest employer in Tullamore for over thirty years | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Scéal i mBarr Bata? | Mac Lochlainn, Alf, 1926- | Article in Journal | | 2010 |
| Shopping in Tullamore since the 1960s: the coming of self-service and supermarkets | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Signal Stations (1804) and Lookout Posts (1940) studies in comfort on the internet | Ferguson, Kenneth | Article in Journal | | 2023 |
| Sir Henry Cavendish (1732–1804), parliamentarian in two countries | Thomas, P. D. G. | Article in Journal | | 2017 |
| Sir Henry Cavendish and the proceedings of the Irish House of Commons, 1776-1800 | Jackson, D. J.Malcomson, A. P. W. | Article in Book | | 2001 |
| Some political and economic interactions in later Victorian England | Ensor, R. C. K. | Article in Journal | | 1949 |
| Strangford : portrait of a village, 1901 - 1911 | Rooney, Colm | Monograph or Collective Volume | Ballykinler, Lecale and Down Historical Society | 2012 |
| The 'compleat and proper plant hunter' | Nelson, E. Charles | Article in Journal | | 2005 |
| The 2nd Duke of Leinster and the establishment of St Patrick's College, Maynooth | Begadon, Cormac | Article in Book | | 2014 |
| The bells of Shandon | Strong, Leonard Alfred George | Article in Journal | | 1939 |
| The building of a hospital, 1804-1940 | Moore, Doreen B. D. Kingsmill | Article in Journal | | 1941 |
| The capture of Leenan fort : episode of the Napoleonic war | McD., E. P. | Article in Journal | | 1941 |
| The Catholic Church's Irishmen in Rome: the correspondence of Paul Cullen and Tobias Kirby | Orschel, Vera | Article in Journal | | 2008 |
| The Complete Poems of John De Jean Frazer – The workman poet from Birr | | Monograph or Collective Volume | Offaly Historical and Archaeological Society | 2022 |
| The contribution of Ulstermen to the 'Bolshaya Igra' ['The Great Game'] | Eakins, W.A. | Article in Journal | | 2005 |
| The Cork, Bandon and south coast railway | Shepherd, William Ernest (Ernie) | Article in Journal | | 1984 |
| The corn laws : the formation of popular economics in Britain. Vol. 1, Whig free trade I; Vol. 2, Whig free trade II; Free trade and Irish nationalism I; Vol. 3, Free trade and Irish nationalism II; James Wilson and the Economist; Vol. 4, Free trade and religion; Vol. 5, Provincial free trade I : Leeds, Manchester and the League; Vol. 6, Provincial free trade II : Free trade farmers | | Monograph or Collective Volume | William Pickering | 1996 |
| The Crehore family of Massachusetts | O'Brien, Michael J. | Article in Journal | | 1918 |
| The De Vesci papers | | Monograph or Collective Volume | Irish Manuscripts Commission | 2006 |
| The duel between 'Danny' and Dizzy' | Rodden, John | Article in Journal | | 2022 |
| The Duke of Leinster withdraws from Ireland : October 1797 | Aylmer, Richard John | Article in Journal | | 2000 |
| The Earl, the nephew and the mountain man | Brennan, Eddie | Article in Journal | | 2006 |
| The eating out experience in Tullamore in the 1960s | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| The Irish disestablishment conference of 1869 | Fair, John D. | Article in Journal | | 1975 |
| The Irish parliamentary diary (1776-89) of Sir Henry Cavendish | Thomas, Peter David Garner | Article in Journal | | 2016 |
| The Irish pound, 1797-1826; a reprint of the report of the committee of 1804 of the British House of Commons on the condition of the Irish currency, with selections from the minutes of evidence presented to the committee and an introduction | | Monograph or Collective Volume | Allen & Unwin | 1955 |
| The life and times of Eyre Massey, first Baron Clarina of Elm Park (1719-1804) | Potter, Matthew | Article in Journal | | 1998 |
| The life and times of Rev. John Orr, M.A., Portaferry. Part 3 | Rutherford, J. C. | Article in Journal | | 1984 |
| The marriage of Thomas Wyse and Lelitia Bonaparte | Holt, Eileen | Article in Journal | | 1979 |
| The men of No Popery : the origins of the Orange Order | Smyth, Jim | Article in Journal | | 1995 |
| The Midlands Butter & Bacon Company Limited, Tullamore, 1928–89, | Guerin, Noel | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| The papers of Lord Robert Loftus | Ainsworth, John F. | Article in Journal | | 1960 |
| The popular Reformation comes to Ireland : the case of John Walker and the foundation of the Church of God, 1804 | Liechty, Joseph | Article in Book | | 1990 |
| The State Solicitor's report on the 1803 rebellion in County Kildare | Chambers, Liam | Article in Journal | | 2000 |
| The Thurstons and Ardmore | Quain, James T. | Article in Journal | | 1984 |
| The Tipperary Mission | Griffin, Brian D. | Article in Journal | | 2012 |
| The visitation note book of Charles Lindsay, bishop of Kildare, 1804-1808 | Refaussé, Raymond | Article in Journal | | 1987 |
| Thomas Moore's harp : the royal portable harp of John Egan | Hurrell, Nancy | Article in Book | | 2008 |
| Tobias Kirby (1804-1895) : the man who kept the papers | Olden, Michael | Article in Book | | 2008 |
| Tomás Ó Míocháin and the Munster Courts of Gaelic poetry | Ó Dálaigh, Brian | Article in Journal | | 2012 |
| Too beautiful for thieves and pickpockets : a history of the Victorian convict prison on Spike Island | McCarthy, CalÓ Donnabháin, Barra | Monograph or Collective Volume | Cork County Library | 2016 |
| Towers of strength : the story of the Martello towers | Clements, W. H. | Monograph or Collective Volume | Leo Cooper | 1999 |
| Trade roots : Offaly's 3 anniversaries : Grand Canal 1804, Tullamore Distillery 1829, Great Southern and Western Railway 1854 | Grand Canal 200 Committee | Monograph or Collective Volume | Grand Canal 200 Committee | 2004 |
| Translation, the French languages and the United Irishmen, 1792-1804 | Kleinman, Sylvie | Thesis | | 2005 |
| Tribulations of a king's printer : George Grierson II in court | Osborough, W. N. (William Nial) | Article in Book | | 2005 |
| Tullamore Hotels since the 1960s | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Two studies in integrity : Gerald Griffin and the Rev. Francis Mahony (Father Prout) | Mannin, Ethel | Monograph or Collective Volume | Jarrolds | 1954 |
| Ulster and the Irish republic | Carson, William A.Gray, David | Monograph or Collective Volume | [s.n.] | 1957 |
| Under the Rainbow : inside John Bruton’s coalition government | Kenny, Shane | Monograph or Collective Volume | Gill Books | 2024 |
| Unionists and patriots: James Whiteside, the Irish bar and the dilemmas of the protestant nation in Victorian Ireland | Maume, Patrick | Article in Book | | 2014 |
| Unpublished letters of Thomas Francis Meagher to Sir Henry Singer Keating | Meagher, T. F. | Article in Journal | | 1938 |
| Victorian architect : the life and work of William Tinsley | Forbes, J. D. | Monograph or Collective Volume | [s.n.] | 1953 |
| Victorian study : an interdisciplinary essay | Wolff, Michael | Article in Journal | | 1964 |
| Voyages on the Shannon, August 1797 | Harden, John | Article in Book | | 1998 |
| Welcome on board! The Sea Stallion from Glendalough : a Viking longship recreated | Andersen, ErikBill, JanDamgard-Sorensen, TinnaNielsen, Soren | Monograph or Collective Volume | Viking Ship Museum | 2007 |
| When Great Men Fall Out : William Wickham's Resignation as Chief Secretary for Ireland in January 1804 | Durey, Michael | Article in Journal | | 2006 |
| White slaves : Irish rebel prisoners and the British army in the West Indies 1799-1804 | Durey, Michael | Article in Journal | | 2002 |
| William Barton Rogers | Sullivan, Michael F. | Article in Journal | | 1913 |
| William Irvine and the complexities of manhood and fatherhood in the Pennsylvania backcountry | Ridner, Judith | Article in Journal | | 2001 |
| William Leeson, Westport's first town planner | Mayock, John | Article in Journal | | 1998 |
| William Linsley (1804-1885) : Clonmel born architect | Ó Duibhir, Liam | Article in Journal | | 2000 |
| William Stokes : his life and work, 1804-1878 | Stokes, William, Sir | Monograph or Collective Volume | | 1898 |
| William Tinsley (1804-1885) | O'Connell, P. | Article in Journal | | 1955 |
| William Tinsley : Victorian or Georgian? | Bence-Jones, Mark | Article in Journal | | 1960 |
| William Walsh, first archbishop of Halifax (1804-1858) | Kelly, Charlotte | Article in Journal | | 1945 |
| [Report of the committee of 1804 of the House of Commons on the condition of the Irish currency] | House of Commons: Committee | Monograph or Collective Volume | | 1803 |
| ‘Every man is exactly what he makes himself’ | McKenny, Laura | Article in Journal | | 2020 |
| ‘The Belfast chameleon’ : Ulster, Ceylon and the imperial life of Sir James Emerson Tennent | Wright, Jonathan Jeffrey | Article in Journal | | 2013 |
| ‘Unfurling the banner of reform’ : public opinion, nationalism, and Facts and Figures from Italy | Dunne, Fergus | Article in Journal | | 2009 |