| "A Thing Most Brutish" : Depicting Shakespeare's Multi-Nation State | Maley, Willy | Article in Journal | | 2007 |
| "Blessed with the holy Father's entertainment" : Roman ceremonial music as experienced by the Irish earls in Rome, 1608 | O'Regan, Noel | Article in Book | | 1993 |
| "Perfidious machiavellian friar" : Florence Conry's campaign for a Catholic restoration in Ireland, 1592-1616 | O'Connor, Thomas | Article in Journal | | 2002 |
| "These are not the thinges men live by now a days" : Sir John Harington's visit to the O'Neill, 1599 | Gardiner, David M. | Article in Journal | | 1999 |
| 'Anocht is uaigneach Éire' | Ó Buachalla, Breandán | Article in Book | Guildhall Press | 2010 |
| 'Buffoonery and easy sentiment' : popular Irish plays in the decade prior to the opening of the Abbey Theatre | Fitz-Simon, Christopher | Monograph or Collective Volume | Carysfort Press | 2011 |
| 'End of a pale' or 'a new pale in the making'? : the 'Barbarous nook' of the North, from Shakespeare to Milton | Maley, Willy | Article in Book | Four Courts Press | 2011 |
| 'God forbid it should come to that' : the feud between Colonel Molesworth and Major-General O'Brien in Portugal, 1663 | Appleby, David J. | Article in Journal | | 2005 |
| 'In manners they be rude, and monst'rous eke in fashion' : images of otherness in early modern drama | Tuite, Patrick | Article in Book | | 2010 |
| 'Slán Dé fút go hoíche' : Hugh O'Neill's murders | Morgan, Hiram | Article in Book | | 2007 |
| 'The departure of O'Neill out of Ireland' by Thomas Ryan (RHA) | Fitzgerald, Patrick | Article in Journal | | 2007 |
| 'The leaven of your forepassed wicked lives purged' : excommunication and exile in part 1 of David Rothe's Analecta (1616) | Hand, Stephen | Article in Journal | | 2012 |
| 'Treason against traitors': Thomas Walker, Hugh O'Neill's would-be assassin | Morgan, Hiram | Article in Journal | | 2010 |
| 'Writings from Rome and Dublons from Spain' : the Ó Neills and St Anthony's College Louvain, 1606-1650 | Hazard, Benjamin | Article in Journal | | 2007 |
| 400th Anniversary for O'Cahan Chief | O'Kane, John James | Article in Journal | | 2015 |
| A city lights up | Hughes, John | Article in Journal | | 1990 |
| A city lights up | Hughes, John | Article in Journal | | 2021 |
| A countess of Tyrone | Duggan, Lucy | Article in Journal | | 1947 |
| A historical study of the career of Hugh O'Neill, second earl of Tyrone, c.1550-1616 | Graham, J. K. | Thesis | | 1938 |
| A history of the Irish working class | Ellis, Peter Berresford, 1943- | Monograph or Collective Volume | | 1985 |
| A project to re-house the St Canice's Cathedral Library from Kilkenny to Maynooth University Library | McCormack, BarbaraMurphy, Hugh | Article in Journal | | 2019 |
| A trail from Whitby to Dungiven | O'Kane, Noel | Article in Journal | | 2010 |
| Ambiguous alliances : early modern Ireland | Bradshaw, Brendan | Article in Journal | | 2005 |
| Ambush : the war between the S.A.S. and the I.R.A. | Adams, JamesBanbridge, AnthonyMorgan, Robin | Monograph or Collective Volume | Pan | 1988 |
| Amhráin Chearbhalláin: the poems of Carolan. Together with other N. Connacht and S. Ulster lyrics. | | Monograph or Collective Volume | Irish Texts Society | 1616 |
| An early seventeenth-century deed of conveyance from Co. Clare | McInerney, Luke | Article in Journal | | 2014 |
| An exile of Ireland : Hugh O'Neill, prince of Ulster | Walsh, Micheline Kerney | Monograph or Collective Volume | Four Courts | 1996 |
| Analecta sacra, nova, et mira - De rebus catholicorum in Hibernia ... gestis | [Roth, David, R.C. Bishop of Ossory] | Monograph or Collective Volume | | 1616 |
| Annála ríoghachta Éireann : Annals of the Kingdom of Ireland, by the four masters, from the earliest period to 1616. 7 vols. | | Monograph or Collective Volume | Hodges & Smith | 1851 |
| Annals of the kingdom of Ireland from the earliest times to the year 1616 | | Monograph or Collective Volume | De Búrca Rare Books | 1990 |
| Battle of Castlehaven | Coleman, Michael | Article in Journal | | 2013 |
| Between nations : Shakespeare, Spenser, Marvell, and the question of Britain | Baker, David J., 1957- | Monograph or Collective Volume | Stanford University Press | 1998 |
| Booterstown Parish | Lyng, Paul | Article in Journal | | 2007 |
| Booterstown Parish, a Pastoral Journey
through four centuries 1616 - 2013 | Lyng, Paul | Monograph or Collective Volume | Choice Publishing | 2013 |
| Breaking the heart of Tyrone's rebellion? An assessment of Mountjoy's first campaigns in Ulster, May-November 1600 | O'Neill, James | Article in Journal | | 2017 |
| Brinkmanship and bad luck: Ireland, the Nine Years' War and the succession | Rapple, Rory | Article in Book | | 2014 |
| Buckingham and Ireland, 1616-1628 | Treadwell, Victor | Monograph or Collective Volume | Four Courts | 1998 |
| But the Irish Sea betwixt us : Ireland, colonialism, and Renaissance literature | Murphy, Andrew | Monograph or Collective Volume | University Press of Kentucky | 1999 |
| Castlehaven's Munster campaign of 1645 | McCarthy, Patrick | Article in Journal | | 2021 |
| Cath Cnoc na nOIs sa bhéaloideas | Tóibín, Feena | Article in Journal | | 2023 |
| Catherine Magennis and the wives of Hugh O'Neill | Casway, Jerrold | Article in Journal | | 2016 |
| Charlemont and Sir Toby Caulfield | Wylie, Mona | Article in Journal | | 1986 |
| Client/Patron relationship in Munster, Sir William St Ledger and Murrough O'Brien 6th Baron Inchiquin 1632-1640 | O'Doherty, Leon | Article in Journal | | 2011 |
| Colonel Walter Bagenal of Dunleckney, his trial for 'pretended murder' | Power, Anne | Article in Journal | | 2018 |
| Corpus Christi in Rome, 1608 | Mac Craith, Mícheál | Article in Book | | 2012 |
| Court-Castle faction and the Irish viceroyalty : the appointment of Oliver St John as Lord Deputy of Ireland in 1616 | Rutledge, V. L. | Article in Journal | | 1989 |
| Cúlra is tábhacht an dáin : a leabhráin ainmnighthear d'Aodh | Ó Buachalla, Breandán | Article in Journal | | 1990 |
| Custom, authority and tolerance in Irish political thought : David Rothe's Analecta Sacra et Mira (1616) | O'Connor, Thomas | Article in Book | | 2009 |
| Custom, authority, and tolerance in Irish political thought : David Rothe's Analecta Sacra et Mira (1616) | O'Connor, Thomas | Article in Journal | | 2000 |
| Dall'isola d'Irlanda a quella di Utopia. Propaganda politica sui due fronti negli anni della rivolta di Hugh O'Neill (1595-1603) | Loverci, Francesca | Article in Journal | | 1998 |
| Death in the Lakelands: Tyrone's proxy war, 1593-4 | O'Neill, James | Article in Journal | | 2015 |
| Death of a community : a personal testimony | Weldon, Liam | Article in Journal | | 1988 |
| Deeds, valuations, Dundalk Democrat Record, Ireland for Patrick McCarchir 1616 and further other persons/Car(R)A(G)Her to 1906 | Wilson, Maureen | Article in Journal | | 1984 |
| Desiderius, otherwise called Sgáthán an Chrábaidh | | Monograph or Collective Volume | | 1941 |
| Diary of the Parliamentary forces in County Clare, 1651 | Cromwellian officer | Article in Book | | 1998 |
| Diplomatic preparations for Kinsale | O'Connor, Thomas | Article in Book | | 2002 |
| Discovering the O'Neill tower-house and Chichester's military fort at Castle Hill, Dungannon | Donnelly, Colm J.Logue, PaulMurray, Emily | Article in Book | | 2010 |
| Documents from Dungannon : some letters of Hugh O'Neill | | Article in Journal | | 1993 |
| East Ulster, the MacDonalds and the provincial strategies of Hugh O'Neill, earl of Tyrone, 1585-1603 | Brady, Ciaran | Article in Book | | 2009 |
| Edmund Ludlow and the good old cause 1651-1667 | Hughes, John H. F. | Thesis | | |
| Edward Blayney | Burns, Michael | Article in Journal | | 2013 |
| Edward Boyd Barrett and the great O'Neill | Ó Conluain, Proinsias | Article in Journal | | 1991 |
| Enforced idleness and the force of idleness in Shakespeare's Richard II | Paganelli, Eloisa | Article in Book | | 2002 |
| England, Ireland, Magna Carta, and the common law : the case of Connor, Lord Maguire, second Baron of Enniskillen | Orr, D. Alan | Article in Journal | | 2000 |
| Eugenio O'Neill, caudillo de la independencia de Irlanda, con los Tercios de Flandes | Tapia Ozcariz, Enrique de | Monograph or Collective Volume | [s.n.] | 1969 |
| Faith and fatherland or queen and country? : an unpublished exchange between O'Neill and the state at the height of the Nine Years War | Morgan, Hiram | Article in Journal | | 1994 |
| Fall of the Gaelic Lords 1534-1616 | Kilroy, Patricia, 1925- | Monograph or Collective Volume | Éamon de Búrca for Edmund Burke | 2008 |
| Field-names 'Sketch the land in language' | Keaney, Harry | Article in Journal | | 2020 |
| Flax growing in Co. Cavan in the forties | Ní Sheasnáin, Áine | Article in Journal | | 1987 |
| Flight departure or escape? | Ó Dálaigh, Art P. | Article in Journal | | 2007 |
| Flight of the earls? Changing views on O'Neill's departure from Ireland | Smith, Murray | Article in Journal | | 1996 |
| Florence Conry, the Flight of the Earls, and native-Catholic militancy | Casway, Jerrold | Article in Journal | | 2011 |
| Franciscan houses of County Clare, 1616 | Mooney, Donagh | Article in Book | | 1998 |
| From Donegal to Rome by foot, boat, coach and horseback | Ó Fiaich, Tomás | Article in Journal | | 1989 |
| From the sea to the mountains : a pastoral journey through four centuries, 1616-2016 | Lyng, Paul | Monograph or Collective Volume | Choice Publishing | 2016 |
| Fuidheall Áir: Bardic poems on the Meic Dhiarmada of Magh Luirg c. 1377–c. 1637 | | Monograph or Collective Volume | Dublin Inststute of Advanced Studies | 2018 |
| Gaelic lordship and Tudor conquest : Tír Eoghain, 1541-1603 | Morgan, Hiram | Article in Journal | | 2005 |
| Half-moons and villainous works | O'Neill, James | Article in Journal | | 2014 |
| Herbert William Parke, 1903-86 | Wormell, D. E. W. | Article in Journal | | 1986 |
| Homelessness and housing in Northern Ireland : an assessment | Blackman, Tim | Article in Journal | | 1988 |
| Hopeless Mission : Sir Roger Casement in Imperial Germany | Doerries, Reinhard R. | Article in Journal | | 2006 |
| Hugh O'Neill - not guilty | Morgan, Hiram | Article in Journal | | 2010 |
| Hugh O'Neill 2nd earl of Tyrone 1601-1607 : Kinsale to Rathmullan | McGurk, J. N. N. (John James Noel) | Article in Journal | | 2001 |
| Hugh O'Neill : free spirit, religious chameleon or ardent Catholic? | O'Connor, Thomas | Article in Book | | 2004 |
| Hugh O'Neill : the Flight of the Earls | Walsh, Micheline Kerney | Monograph or Collective Volume | Flight of the Earls Heritage Centre | 1991 |
| Hugh O'Neill and national identity in early modern Ireland | Iwanisziw, Susan B. | Article in Book | | 2008 |
| Hugh O'Neill and the Berminghams | Hickey, Nora | Article in Journal | | 1983 |
| Hugh O'Neill and the nine years' war in Tudor Ireland | Morgan, Hiram | Article in Journal | | 1993 |
| Hugh O'Neill in Irish historical discourse, c.1550-2021 | Canny, Nicholas | Article in Journal | | 2022 |
| Hugh O'Neill the Great | Falls, Cyril Bentham | Article in Journal | | 1963 |
| Hugh O'Neill, 2nd earl of Tyrone and Captain Thomas Lee, double-agent | McGurk, J. N. N. (John James Noel) | Article in Journal | | 2006 |
| Hugh O'Neill, earl of Tyrone, c.1550-1616 | Jefferies, Henry A. | Article in Book | | 2000 |
| Hugh O'Neill, second earl of Tyrone and the historians | McGurk, John | Article in Journal | | 2011 |
| Hugh O'Neill, the Catholic question and the Papacy | Silke, John J. | Article in Journal | | 1965 |
| I Henry IV : metatheatrical Britain | Greenfield, Matthew | Article in Book | | 2002 |
| Il conte di Tyrone esule a Roma | Crinó, A. M. | Article in Journal | | 1958 |
| Imtheacht na nIarlaí: an cúlra stairiúil. | Ó Donnaile, Antaine | Article in Journal | | 2010 |
| In Tyrone's shadow : Feagh McHugh O'Byrne, forgotten leader of the Nine Years War | Edwards, David, 1963- | Article in Journal | | 1998 |
| Inchiquin and the war in Munster, 1646-1647 | McCarthy, Patrick | Article in Journal | | 2023 |
| Inchiquin's Sack of Cashel 1647 | O'Doherty, Leon | Article in Journal | | 2012 |
| Ireland and Islam : Henry V and the "War on Terror" | Coleman, David, 1979- | Article in Journal | | 2008 |
| Ireland, Elizabeth I and the Counter-Reformation | Edwards, R. W. D. (Robert Walter Dudley) | Article in Book | | 1961 |
| Irish country houses: a chronicle of change | Hicks, David | Monograph or Collective Volume | The Collins Press | 2012 |
| Irish Jesuit Annual Letters, 1604-1674 | | Monograph or Collective Volume | Irish Manuscripts Commission | 2019 |
| Irish warfare in the age of the military revolution : the 'Nine Years War', 1593-1603 | O'Neill, James | Thesis | | |
| Joycean translations of Anna Livia Plurabelle : 'Its tranlations Jim but not as we know it' | O'Sullivan, Carol | Article in Book | | 2006 |
| Kinsale : the Spanish intervention in Ireland at the end of the Elizabethan wars | Silke, John J. | Monograph or Collective Volume | Four Courts | 2000 |
| Labour in Scotland and Northern Ireland : the inter-war experience | Walker, Graham | Article in Book | | 1988 |
| Lament for the princes of Tyrone and Tyrconnell. Mac an Bhaird's elegy on the Ulster lords | Meehan, Helen | Article in Journal | | 2011 |
| Later relations between the Primate Peter Lombard and Hugh O'Neill | Silke, John J. | Article in Journal | | 1955 |
| Léachtaí Cholm Cille XXXVIII : Éire agus an Eoraip sa 17ú haois | | Monograph or Collective Volume | An Sagart | 2008 |
| Ligoniel : the last of the mill villages | | Monograph or Collective Volume | W.E.A. | 1981 |
| Like sheep to the shambles? Slaughter and surrender during Tyrone's rebellion, 1593-1603 | O'Neill, James | Article in Journal | | 2018 |
| Literature and national identity | McEachern, Claire | Article in Book | | 2002 |
| Lord Inchiquin and the Munster clergy, 1643-9 | Little, Patrick | Article in Book | Four Courts Press | 2025 |
| Maclise and Shakespeare | Cullen, Fintan | Article in Book | | 2012 |
| Maguire's revolt but Tyrone's war: proxy war in Fermanagh, 1593-4 | O'Neill, James | Article in Journal | | 2016 |
| Manuail de litríocht na Gaeilge : Faisicil 2 : litríocht linn an choncais, 1536-1616 | Ó Doibhlín, Breandán | Monograph or Collective Volume | Coiscéim | 2006 |
| Manuail de litríocht na Gaeilge : Faisicil 3 : an 'Lá idir dhá Shíon', 1616-1641 | Ó Doibhlín, Breandán | Monograph or Collective Volume | Coiscéim | 2007 |
| Matters relating to the indictments of 'the fugitive earls and their principal adherents' | Harris, F. W. | Article in Journal | | 1983 |
| Mountjoy Fort and Mountjoy Castle | Fee, AidanMayes, Frank | Article in Journal | | 2010 |
| Murrough O'Brien, sixth baron and first earl of Inchiquin | Murphy, John A. | Thesis | | 1951 |
| Murrough the burner : Murchadh na dTóiteán : a life of Murrough, sixth baron and first earl of Inchiquin, 1614-74 | O'Brien, Ivor | Monograph or Collective Volume | Ballinakella | 1991 |
| Murtagh O'Quinn. O'Neill's 'major-domo ' and the Flight of the Earls | McCavitt, John | Article in Journal | | 2012 |
| Na taoisigh Ultacha agus an Veronica | Mac Craith, Mícheál | Article in Book | | 2015 |
| Neglected Intelligence : How the British Government Failed to Quell the Ulster Volunteer Force, 1912-1914 | Grob-Fitzgibbon, Benjamin John | Article in Journal | | 2006 |
| New light on the Marquis of Antrim and the "Wars of the Three Kingdoms" | Gordon, George, b.1616 | Article in Journal | | 2009 |
| No "brave Irishman" need apply : Thomas Sheridan, Shakespeare and the Smock-Alley Theatre | Schneller, Beverly E. | Article in Book | | 1998 |
| No sex, please, we're Catholic: the influence of the Catholic church on the declining marriage rates in Ireland between the Famine and the First World War | Foley, Aideen | Thesis | | 2000 |
| Northern Ireland since 1968 | Arthur, Paul, 1945-Jeffery, Keith | Monograph or Collective Volume | Blackwell Publishers | 1988 |
| Notes on Sir William Hull and Leamcon, etc. | O'Donovan, Michael | Article in Journal | | 1993 |
| Ó Neill agus an tAos Léinn | Ó Buachalla, Breandán | Article in Book | | 2008 |
| O'Neill's frontier campaign of 1595 in mid Armagh | McGleenon, C. F. | Article in Journal | | 1994 |
| O'Sullivan Bere : the story of the fight for the southern ports and the great retreat | De Blacam, Aodh | Article in Journal | | 1947 |
| Of whistlers and runners-in : The published work of Lena Boylan | | Monograph or Collective Volume | Castletown Press | 2016 |
| On the other side of the ocean : John Stritch, SJ (1616-81) and Irish Catholic missionaries in the West Indies | Binasco, Matteo | Article in Book | | 2015 |
| Opposites attract: Hugh O'Neill and Red Hugh O'Donnell | McGinty, Matthew | Article in Journal | | 2014 |
| Papal privileges for Ulster churches, 1608 | Mac Cuarta, Brian | Article in Journal | | 2008 |
| Parallel lives : a comparison between Jugurtha, king of Numidia and Hugh O’Neill, earl of Tyrone by Sir James Perrot | Morgan, Hiram | Article in Journal | | 2020 |
| Parley sites of Ó Néill and Ó Domhnaill in late sixteenth-century Ireland | FitzPatrick, Elizabeth | Article in Book | | 2004 |
| Peig, Aonghus Ó Dálaigh agus MacBeth | Ó Háinle, Cathal | Article in Book | | 1989 |
| Policy and propaganda in Hugh O'Neill's connection with Europe | Morgan, Hiram | Article in Book | | 2010 |
| Politics and religion in the poetry of Fearghal Óg Mac an Bhaird and Eoghan Ruadh Mac an Bhaird | Caball, Marc | Article in Book | | 2002 |
| Practical views and suggestions on the present condition and permanent improvement of Ireland | Hibernicus [i.e. MacDonnell, E. G.] | Monograph or Collective Volume | | 1823 |
| Probable early students of Trinity College, Dublin (being wards of the crown), 1599-1616 | Berry, H. F. | Article in Journal | | 1911 |
| Protestant provincial survival or Confederate control : Inchiquin and the Battle of Liscarroll 1642 | O'Doherty, Leon | Article in Journal | | 2015 |
| Pue’s Occurrences 1744-9 | McCutcheon, Rosalind | Article in Journal | | 1996 |
| Red Hugh and Rose O'Neill | Donnelly, Morwena | Article in Journal | | 1986 |
| Reflection on the Flight of the Earls | O'Donnell, Eunan | Article in Journal | | 2006 |
| Reports on the Rawlinson collection of manuscripts preserved in the Bodleian Library, Oxford | McNeill, Charles | Article in Journal | | 1930 |
| Richard Weston agus 'Beir mo bheannacht go Dundalk | Ó Fiaich, Tomás | Article in Journal | | 1970 |
| Rogue warrior of the S.A.S. : Lt Col 'Paddy' Blair Mayne | Bradford, RoyDillon, Martin | Monograph or Collective Volume | John Murray | 1987 |
| Rothe's Castle, Dundalk and Hugh O'Neill : a sixteenth century map | O'Sullivan, Harold | Article in Journal | | 1965 |
| Rug-headed kerns speaking tongues : Shakespeare, translation and the Irish language | Cronin, Michael, 1960- | Article in Book | | 1998 |
| San Pietro in Montorio, burial-place of the exiled Irish in Rome | FitzPatrick, Elizabeth | Article in Journal | | 2007 |
| Settlers and pirates in early seventeenth-century Ireland : a profile of Sir William Hull | Appleby, John C. | Article in Journal | | 1997 |
| Settlers and pirates in early seventeenth-century Ireland : a profile of Sir William Hull | Appleby, John C. | Article in Journal | | 1989 |
| Shakespeare and Ireland : history, politics, culture | | Monograph or Collective Volume | Macmillan | 1998 |
| Shakespeare and the cultural colonization of Ireland | Bates, Robin E., 1971- | Monograph or Collective Volume | Routledge | 2007 |
| Shakespeare and the definition of the Irish nation | English, Richard, 1963- | Article in Book | | 1998 |
| Shakespeare was Irish? | Nugent, Brian | Monograph or Collective Volume | Brian Nugent | 2008 |
| Shakespeare, Spenser, and the crisis in Ireland | Highley, Christopher | Monograph or Collective Volume | Cambridge University Press | 1997 |
| Shakespeare, Spenser, and the matter of Britain | Hadfield, Andrew | Monograph or Collective Volume | Palgrave Macmillan | 2004 |
| Sir Arthur Chichester : Lord deputy of Ireland, 1605-1616 | McCavitt, John | Monograph or Collective Volume | Queen's University of Belfast, Institute of Irish Studies | 1998 |
| Sir John Davies in Cavan in 1606 and 1610 | Hayes-McCoy, G. A. (Gerard Anthony) | Article in Journal | | 1961 |
| Sir William Hull's losses in 1641 | Went, A. E. J. | Article in Journal | | 1947 |
| Sixteenth-century Ulster and the failure of Tudor reform | Brady, Ciarán | Article in Book | | 1989 |
| Some grisly and otherwise quirky deaths in the Irish annals | Ó Muraíle, Nollaig | Article in Book | | 2016 |
| Some Irish 18th century editions of Shakespeare, not recorded by Jaggard, Stockwell or Ford | O'Hegarty, P. S. | Article in Journal | | 1952 |
| Spanish intervention in Ireland, 1601-2 : Spanish bibliography | Silke, John J. | Article in Journal | | 1963 |
| Staging Ireland : representations in Shakespeare and Renaissance drama | O'Neill, Stephen, 1973- | Monograph or Collective Volume | Four Courts | 2007 |
| Strangers to that land : British perceptions of Ireland from the Reformation to the famine | | Monograph or Collective Volume | Smythe | 1994 |
| Survey of Tipper graveyard | McCabe, Brian | Article in Journal | | 1996 |
| Tadhg Ó Cianáin : spaghetti fiannaigheacht | Mac Craith, Mícheál | Article in Book | | 2012 |
| Taking sides in early modern Ireland : the case of Hugh O'Neill, earl of Tyrone | Canny, Nicholas P. | Article in Book | | 2003 |
| The "Flight of the Earls": new light from a Roman necrology | Troy, KieranÓ Fearghail, Fearghus | Article in Journal | | 2010 |
| The "Irish road" : military supply and arms for Elizabeth's army during the O'Neill rebellion in Ireland, 1598-1601 | Stewart, R. W. | Article in Book | | 1991 |
| The aesthetics of Irish bardic composition : an analysis of 'Fuaras iongradh, a fhir chumainn' by Fearghal Óg Mac an Bhaird | Breatnach, Pádraig A. | Article in Journal | | 2001 |
| The analecta of David Rothe, Bishop of Ossory | Moran, Patrick Francis, cardinal, 1830-1911Roth, David, R. C. Bishop of Ossory | Monograph or Collective Volume | M.H. Gill & Son | 1884 |
| The army of Ulster, 1593-1601 | Hayes-McCoy, G. A. (Gerard Anthony) | Article in Journal | | 1949 |
| The battle of Clontibret | Ó Mearáin, Lorcán | Article in Journal | | 1956 |
| The Battle of the Yellow Ford | Logue, PaulO'Neill, James | Article in Journal | | 2007 |
| The birth date of Hugh O'Neill, 2nd Earl of Tyrone | Graham, J. K. | Article in Journal | | 1938 |
| The British Isles | Webber, G. C. | Article in Book | | 1987 |
| The buannadha : Irish professional soldiery of the sixteenth century | Ó Báille, M. | Article in Journal | | 1946 |
| The career of Hugh O'Neill, earl of Tyrone, from 1603 to 1607 | Canny, Nicholas P. | Thesis | | 1967 |
| The Crum : inside the Crumlin Road Prison | Greg, Patrick | Monograph or Collective Volume | Gill & Macmillan | 2007 |
| The decline and fate of Dónal Ballagh O'Cahan and his family | Casway, Jerrold | Article in Book | | 2001 |
| The defence of the Moyry Pass, 1600 | Hayes-McCoy, G. A. (Gerard Anthony) | Article in Journal | | 1957 |
| The deputy's defence: Sir William Fitzwilliam's Apology on the outbreak of the Nine Years War in Ireland | Morgan, Hiram | Article in Journal | | 2014 |
| The earl of Essex and Ireland, 1599 | Henry, L. W. | Article in Journal | | 1959 |
| The earls in popular memory | Morley, Vincent | Article in Book | | 2010 |
| The early life of Hugh O'Neill | Graham, J. K. | Article in Journal | | 1939 |
| The episcopal succession of Killaloe, A.D. 1317-1616 | Gleeson, Dermot F. | Article in Journal | | 1940 |
| The fallen chieftain : the tomb of Hugh O'Neill, Earl of Tyrone at San Pietro de Montorio, Rome | Mongan, Norman | Article in Journal | | 1984 |
| The flight of the Earl : Hugh O'Neill as an index of Irish cultural liminality | O'Brien, Eugene | Article in Book | | 2005 |
| The Flight of the Earls | Mac Curtain, Margaret | Article in Book | Arlen House | 2019 |
| The flight of the earls | Ó Cianáin, Tadhg, c.1575-1610 | Monograph or Collective Volume | | 1916 |
| The flight of the earls | McCavitt, John | Monograph or Collective Volume | Gill & Macmillan | 2002 |
| The flight of the earls | Boyle, Alexander | Article in Journal | | 1955 |
| The flight of the earls | Mac Curtain, Margaret | Article in Book | | 1986 |
| The flight of the Earls : a popular history | Swords, Liam | Monograph or Collective Volume | Columba | 2007 |
| The Flight of the Earls : escape or strategic regrouping | McGurk, J. N. N. (John James Noel) | Article in Journal | | 2007 |
| The flight of the earls, 1607 | McCavitt, John | Article in Journal | | 1994 |
| The flight of the poets : Eoghan Ruadh and Fearghal Óg Mac an Bhaird in exile | Ó Macháin, Pádraig | Article in Journal | | 2008 |
| The Franciscan houses of Thomond in 1616 | Ryan, Martin | Article in Journal | | 1967 |
| The French expedition to Gigeri, 1664 | Ó hAnnracháin, Eoghan | Article in Journal | | 2016 |
| The Genesis of John Speed's Maps of Battles in England and Ireland | Goffart, Walter | Article in Journal | | 2004 |
| The great O'Neill. A biography of Hugh O'Neill, Earl of Tyrone, 1550-1616 | O'Faolain, Sean | Monograph or Collective Volume | Longmans Green ; Mercier Press | 1942 |
| The green cockatrice | Iske, Basil | Monograph or Collective Volume | Meath Arch. & Historical Soc. | 1978 |
| The growth of Irish military strength in the second half of the 16th century | Falls, Cyril Bentham | Article in Journal | | 1954 |
| The Irish appeal of 1593 to Spain : some light on the genesis of the 'Nine Years' War' | Silke, John J. | Article in Journal | | 1959 |
| The Irish Peter Lombard | Silke, John J. | Article in Journal | | 1975 |
| The journal of Sir Roger Wilbraham, solicitor-general in Ireland and master of requests, 1593-1616, together with notes in another hand for the years 1642-1649 | | Article in Book | | 1902 |
| The landowners of the late Elizabethan Pale : 'The Generall hosting appointed to meet at ye Hill of Tarrah on the 24 of September 1593' | Scott, Brendan | Article in Journal | | 2006 |
| The landowners of the late Elizabethan Pale: 'The Generall Hosting appointed to meet at ye Hill of Tarrah on the 24 of September 1593' | | Article in Journal | | 2012 |
| The last years of Hugh O'Neill : Rome, 1608-16 | Walsh, Micheline | Article in Journal | | 1969 |
| The long shadow of Seán O'Faoláin's 'Great O'Neill' | Morgan, Hiram | Article in Journal | | 2016 |
| The lord deputyship of Sir Arthur Chichester in Ireland, 1605-16 | McCavitt, John | Thesis | | 1988 |
| The making of an O'Neill | Hayes-McCoy, G. A. (Gerard Anthony) | Article in Journal | | 1970 |
| The making of the Annals of the Four Masters | Cunningham, Sarah Bernadette | Thesis | | 2005 |
| The management of schools in Northern Ireland : reflections on the Astin Report | Astin, Alan E. | Article in Book | | 1987 |
| The Nine Years War, 1593 - 1603 : O'Neill, Mountjoy and the military revolution | O'Neill, James | Monograph or Collective Volume | Four Courts | 2017 |
| The O'Neill memorials at Donaghmore and Dundee | O'Neill, Pat | Article in Journal | | 2016 |
| The O'Neills of the Fews | Ó Fiaich, Tomás | Article in Journal | | 1977 |
| The place of the Fathers in early Irish devotional literature | Hennig, John | Article in Journal | | 1955 |
| The plight of the earls : Tyrone and Tyrconnell's 'Grievances' and Crown coercion in Ulster, 1603-7 | Edwards, David, 1963- | Article in Book | | 2010 |
| The political and military career of Murrough O'Brien, 6th baron and later 1st earl of Inchiquin, 1614-1650, with special reference to the confederate wars period | O'Doherty, Leon | Thesis | | 2009 |
| The political background to the Ulster plantation, 1607-1620 | McCavitt, John | Article in Book | | 1993 |
| The poor law and pensions in Ireland (research note) | Guinnane, Timothy W. | Article in Journal | | 1993 |
| The Prince of Orange and the earl of Tyrone | Morrissey, Thomas J. | Article in Journal | | 1960 |
| The Sack of Cashel 1647 | Swift,Dave | Article in Journal | | 2023 |
| The sojourn of the Ulster Earls at Louvain (November 1607 until February 1608) : movement, meetings and partings | McEvoy, James | Article in Journal | | 2008 |
| The state of the realm : English military, political, and diplomatic responses to the flight of the earls, autumn 1607 to spring 1608 | Harris, F. W. | Article in Journal | | 1980 |
| The tide of victory and defeat, 1 : The battle of Clontibret, 1595; 2 : The battle of Kinsale, 1601 | Hayes-McCoy, G. A. (Gerard Anthony) | Article in Journal | | 1949 |
| The tomb of Hugh O'Neill in San Pietro in Montorio in Rome | Ó Fearghail, Fearghus | Article in Journal | | 2008 |
| The too perfect hero: Hugh O'Neill: historiography and mythology | Smith, Murray Joseph | Thesis | | 1994 |
| The treaty of Mellifont and the reorganisation of Ulster, 1603 | Canny, Nicholas P. | Article in Journal | | 1969 |
| The war in County Clare, 1651 | Ludlow, Edmund | Article in Book | | 1998 |
| The wives of Hugh O'Neill, second earl of Tyrone | Lyons, Mary Ann | Article in Journal | | 2007 |
| The Wives' Tales | O'Kane, John J. | Article in Journal | | 2016 |
| The Wogan Monument | Cooke-Trench, T. | Article in Journal | | 1902 |
| Thomas Walker and the Earl of Tyrone | Morgan, Hiram | Article in Journal | | 2010 |
| Transportation from Wicklow Gaol. Part 1|Transportation from Wicklow Gaol. Part 2|Transportation from Wicklow Gaol. Part 3|Transportation from Wicklow Gaol. Part 4|Transportation from Wicklow Gaol. Part 5|Transportation from Wicklow Gaol. Part 6 | O'Reilly, Stan J. | Article in Journal | | 2017 |
| True likenesses? The search for authentic portraits of the Great O'Neills | Morgan, Hiram | Article in Journal | | 2011 |
| Turas na dTaoiseach nUltach as Éirinn = From Ráth Maoláin to Rome : Tadhg Ó Cianáin's contemporary narrative of the journey into exile of the Ulster chieftains and their followers, 1607-8 (The so-called 'Flight of the Earls') | Ó Cianáin, Tadhg, c.1575-1610 | Monograph or Collective Volume | Pontifical Irish College | 2007 |
| Tyrone's rebellion : the outbreak of the nine years' war in Tudor Ireland | Morgan, Hiram | Monograph or Collective Volume | Boydell | 1993 |
| Tyrone's rebellion: Hugh O'Neill and the outbreak of the Nine Years War | Finnegan, Micheal David | Thesis | | 2001 |
| Uaigneach a-deirthear Dún Baoi: marbhna ar Eóghan Óg Ó Súilleabháin (†1616) | Mac a’ Ghoill, Philip | Article in Journal | | 2023 |
| Valiant Irish mothers, 3 | Concannon, Helena | Article in Journal | | 1944 |
| Veterinary ventures : memorable events in the life of a veterinary surgeon from college days in Dublin to retirement in Vancover, British Columbia | Earnshaw, Richard | Monograph or Collective Volume | Pentland Press | 2001 |
| West Cork and the first flight of the Irish Wild Geese | O'Donovan, Perry | Article in Journal | | 2008 |
| Why did the earl of Tyrone join the flight? | Finnegan, David | Article in Book | | 2010 |
| Yeats, Shakespeare and Ireland | Nevo, Ruth | Article in Book | | 1991 |