| 16222 | Birr Castle Archives | A-W | 1866 | N8/1: Small envelope of newspaper cuttings regarding... | The Rosse Papers |
| 18630 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.08/1/1865 Extract from the Order of Petition m... | Bishop W. Keane Papers |
| 18631 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.04/1/1865 Letter from Bishop D Moriarty, Killa... | Bishop W. Keane Papers |
| 18632 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.07/2/1865 Letter from Miss Warren, Kinsale, to... | Bishop W. Keane Papers |
| 18633 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.05/16/1865 Letter from Revd. M O'Brien, Mitche... | Bishop W. Keane Papers |
| 18634 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.05/21/1865 Letter from Revd. C Davis, Grenagh ... | Bishop W. Keane Papers |
| 18635 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.05/22/1865 Letter from Revd. T W Croke, St Col... | Bishop W. Keane Papers |
| 18636 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.05/95/1865 Letter from Revd. T Murphy, Youghal... | Bishop W. Keane Papers |
| 18637 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.06/5/1865 Letter from Sister M Baptist, Mercy ... | Bishop W. Keane Papers |
| 18638 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.06/6/1865 Letter from Sister M Joseph, Mallow,... | Bishop W. Keane Papers |
| 18639 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.06/1/1865 Letter from Sister M J Croke, Mercy ... | Bishop W. Keane Papers |
| 18643 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.07/11/1865 Letter from Mary Kelher, Macroom, t... | Bishop W. Keane Papers |
| 18644 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.05/44/1865 Letter from Revd. C Davis, Grenagh... | Bishop W. Keane Papers |
| 18640 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.05/30/1865 Letter from Revd. D Dilworth, Glanw... | Bishop W. Keane Papers |
| 18641 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.06/2/1865 Letter from P D McDonnell, Honorary ... | Bishop W. Keane Papers |
| 18642 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.07/9/1865 Photocopy no 31, Margaret Kepple, Ana... | Bishop W. Keane Papers |
| 18645 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.05/52/1865 Latin request for dispensation and... | Bishop W. Keane Papers |
| 18646 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.05/71/1865 Letter from Revd. J Cullinan, Macro... | Bishop W. Keane Papers |
| 18647 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.06/3/1865 Letter from Sister M J Croke, Mercy ... | Bishop W. Keane Papers |
| 18648 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.07/18/1865 Letter from Mr P Keenedy, Mitchelst... | Bishop W. Keane Papers |
| 18649 | Cloyne Diocesan Archive (RC) | Box EE | 1865 | 1796.06/4/1865 Letter from Sister M J Croke, Mercy ... | Bishop W. Keane Papers |
| 13180 | Cork City and County Archives | U172 | 1865 | Xerox of a letter from Jeremiah O'Donovan Rossa ... | |
| 1394 | Cork Public Museum | AQNO1954:35 | 1865 | Letter, dated 10 October 1865, from O'Donovan Ro... | |
| 1395 | Cork Public Museum | AQNO1954:36 | 1865 | Letter, dated 22 November 1865, from O'Donovan R... | |
| 22905 | Cultural Heritage Services Library, Armagh | | 1866 | Rental, maps and descriptive particulars of the land... | |
| 20433 | Dún Laoghaire-Rathdown County Council | | 1865 | Receipt issued by J. Mercer, Registrar, Deansgrange ... | Records of Dean's Grange Joint Burial Board |
| 22189 | Irish Jesuit Archives | N4/ | 1865 | 18 Letter from O'Hagan to his 'dear Sister' Marianne... | Papers of Judge John O'Hagan (1822-1890) |
| 21894 | Kerry Local Studies and Archives Department | | 1865 | Deeds, Kerry Estate: No 137 5 December 1865. Fee Far... | Listowel Papers |
| 13185 | Kilmainham Gaol Museum | 07LG-1C45-15 | 1866 | Baptismal certificate of Maria McDonald, December 18... | Easter Week |
| 21150 | King's Hospital School | 232-236A | 1866 | 225F Mercer's Rental, 1866. | King's Hospital Records |
| 21209 | King's Hospital School | 5/ | 1866 | 14 Mercers's School Quarterly Abstract of Expenditur... | Mercer's School |
| 13181 | Limerick Museum | AQNO (0000.1961) | 1853
1865 | Manuscript. Mortgage. Loan of one thousand pounds by... | |
| 14125 | Louth County Archives | | 1865 | Rental of lands of Glyde Farm, the Estate of Lewis U... | |
| 3961 | National Archives of Ireland | CSO/ICR 13 | 1866 | Habeas Corpus Suspension Act, 1866: Indexed lists of... | Irish Crimes Records |
| 3982 | National Archives of Ireland | CCS1865/173 | 1865 | Chief Crown Solicitor's Office Mary Hayes, prisoner ... | Chief Crown Solicitor's Office |
| 4852 | National Archives of Ireland | 999/283/1 | 1866 | Agreement for sale by Mary Anne Hill, Royal Terrace,... | House for Fallen Females/Northcote Rescue Home, 1866-1920 |
| 4866 | National Archives of Ireland | 999/836/4 | 1865 | Lease for 14 years by his Grace Richard Chenveix, Lo... | Mercer School Records |
| 12181 | National Archives of Ireland | FileA/242 | 1866 | Includes letter to Sir Thomas from Wodehouse, 3 Apri... | Fenian Papers |
| 15370 | National Archives of Ireland | 99/56/10/14/11 | 1865 | Papers relating to King's County. Lease for 58 years... | Family and estate records. 1611-1948 |
| 1954 | National Library of Ireland | Mss4793-4795 | 1860
1865-1866
1869-1870 | Three journals of Lady Alice Howard which include ac... | Wicklow Papers |
| 9618 | National Library of Ireland | Ms29762(6) | 1865 | Arrears due on Tintern estate, 1865. | Colclough Papers |
| 11075 | National Library of Ireland | Ms19346 | 1865 | A volume of manuscript copies of popular songs and a... | |
| 11637 | National Library of Ireland | Ms12486 | 1865-1866 | Claremorris Poor Law Union Minute Book, 9 September ... | |
| 11638 | National Library of Ireland | Ms12487 | 1866 | Claremorris Poor Law Union Minute Book, 10 March 186... | |
| 18971 | Offaly Archives | OCL BG158/7 | 1866 | Rate Return Form. Returns form for Tullamore Union f... | Rate Return Form |
| 6368 | Public Record Office of Northern Ireland | T/1769 | 1865-1866
1901 | T/1769/3 Copy of the emigrant diary of Elizabeth An... | |
| 7111 | Public Record Office of Northern Ireland | D/2804/5 | c1865 | Photograph of Hariot Georgina, Lady Dufferin, c1865. | |
| 4157 | Religious Society of Friends in Ireland Historical Library | Deed Box X | 1866 | Bridget Carroll, nee Boylan, Meath Street, Dublin: F... | Deeds |
| 22093 | Representative Church Body Library | B10 | 1864
1865
1866
1870 | Diocese of Cork and Ross Visitation Books, Vicar Gen... | St Fin Barre's Cathedral Cork Archive |
| 22097 | Representative Church Body Library | B10 | 1863
1866 | Rural Deans' Reports for the Diocese of Cloyne, ... | St Fin Barre's Cathedral Cork Archive |
| 22098 | Representative Church Body Library | B10 | 1864
1865 | Rural Deans' Reports for the Diocese of Cloyne:1... | St Fin Barre's Cathedral Cork Archive |
| 10175 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs7890/9 | 1866
1911 | Childers Photograph Collection, miscellaneous identi... | Erskine Childers Papers |
| 10204 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs9886 | 1866 | Diary of Miss Elsie Burgess, born c1866, fiancée of... | Henry John Allen Papers |