| 6965 | Armagh County Museum | 1986/69 | 1832-1842 | Minute Book of the Armagh Benevolent Society for 183... | |
| 13106 | Armagh County Museum | 1962/170 | 1841-1842 | Rent Book, Dartry estate, County Armagh for November... | |
| 16415 | Armagh Diocesan Archive (RC) | | 1842-1861
1880 | Appeals, includes:Folder number 2: Donegal Distress,... | Primate McGettigan Archive |
| 19140 | Armagh Robinson Library | Volume 11 | 1842 | A letter from Revd J.C. Crosthwaite to Mr Jones info... | Primate J.G. Beresford Papers |
| 16164 | Birr Castle Archives | A-W | 1806-1842 | D/7/1-170: Letters to Sir William Parsons from his u... | The Rosse Papers |
| 20670 | Carlow County Archive | | 1817-1842 | Borough of Carlow Minute Book: 24 June 1817 - ... | Carlow Local Authority Records |
| 16773 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1789-1842 | Register of Births and Christenings, parish of Tippe... | Bolton Library Archive |
| 16774 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1789-1842 | Register of Marriages and Burials, Tipperary Parish,... | Bolton Library Archive |
| 16797 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1842-1876 | Register of Marriages, Baptisms and Births, Cashel p... | Bolton Library Archive |
| 16879 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1813-1842 | Register of Baptisms, Marriages and Burials of St Jo... | Bolton Library Archive |
| 16880 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1654-1842 | Records or a Registers Book 'wherein the names a... | Bolton Library Archive |
| 16921 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1735
1823
1842 | Among material located in the filing cabinet:(5) (a)... | Bolton Library Archive |
| 16970 | Clare County Archives | | 1842-1921 | Minute Books:September 1842-January 1845May 1848-Jan... | Kilrush Poor Law Union |
| 17018 | Cloyne Diocesan Archive (RC) | | 1842 | 1793.05/6/1842 extract from letter Rev. P Cullen to ... | Bartholomew Crotty Papers |
| 13110 | Cork City and County Archives | U46/ | 1842-1854 | 1 form of admission 19 September 1842, paper 2 two ... | |
| 23223 | Cork City and County Archives | U15B/ | 1842 | P/C 89 Charlotte Hewitt (aunt) to 'My dear Tom&#... | Thomas Hewitt Papers |
| 1431 | Fingal County Archive | GJ/1/1- GJ/3/12 | 1818-1842 | GJ/1/1 1818-1841 Minutes and Orders, c.245 pages.GJ/... | County of Dublin Grand Jury |
| 3 | Irish Dominican Congregation Archives | A12 | 1827-1842 | Channel Row, Cabra: Account Book, number 9, 1827 - 1... | Dominican Archives, Cabra |
| 5145 | Irish Jesuit Archives | MACE/MCAU/ | 1787-1842 | 1 Catherine McAuley's Chronology 1787- 1835'... | John MacErlean SJ research on Mother Catherine McAuley (1778-1841) |
| 2053 | Kerry Local Studies and Archives Department | BG154/B/ | 1842-1903 | Letter Books:1. 25 August 1842 - 23 December 1843 Of... | Tralee Poor Law Union |
| 12016 | Kerry Local Studies and Archives Department | SL/B/1 | 1842-1939 | Documents relating to the Chute estate such as draft... | Chute Papers |
| 3358 | Kilkenny Local Studies Department | BG101/A | 1842-1922 | Minute Books:6. September 1842-May 18437. June 1843-... | Kilkenny Poor Law Union |
| 3359 | Kilkenny Local Studies Department | BG101/AA | 1842-1922 | Rough Minute Books:1. July 1842-March 18442. Decembe... | Kilkenny Poor Law Union |
| 20924 | King's Hospital School | 1-16a | 1842-1844 | 10 Noddstown Committee, 1842-1844. | King's Hospital Records |
| 21667 | Laois Local Studies | | 1842-1860 | Lease of Lands by the Earl of Milltown in County Dow... | |
| 21711 | Laois Local Studies | | 1816-1842 | Stradbally Assizes Summer 1816-Lent 1842. | Laois Local Authority Records |
| 1669 | Leitrim Local Studies Department | BG122/CA/ | 1842-1850
1872-1897 | Accounts, General Ledgers:1 - 1842-18462 - 1846-1848... | Mohill Poor Law Union |
| 18817 | Limerick Archives | BG 110 | 1842-1922 | I. Minute Books, 1842-1870:BG/110 A/3. 4 May 18... | Limerick Poor Law Union |
| 18812 | Limerick Archives | BG 110 | 1842
1862-1875 | VIII. General Ledgers:BG/110/C/1. March 1842 - Septe... | Limerick Poor Law Union |
| 18816 | Limerick Archives | BG 110 | 1842-1848
1880-1883
1885-1890 | II. Rough Minute Books:BG/110/AA/1. 1 June 1842 - 26... | Limerick Poor Law Union |
| 13107 | Limerick Museum | AQNO (000.1895) | 1841-1842 | Poster. Account of the Governors and Governesses of ... | |
| 13111 | Limerick Museum | AQNO (0000.1896) | 1842-1843 | Poster. Account of the Governors and Governesses of ... | |
| 20245 | Meath Local Studies and Family History Department | Box H/ | 1842 | 5 Memorial of deed between John Elvin and Charles Bl... | Mountainstown Documents |
| 20310 | Meath Local Studies and Family History Department | Box A/ | 1842 | 15 Letter to Arthur Pollock regarding rent, 1842. | Mountainstown Documents |
| 1857 | Monaghan County Museum | 1982:118 | 1842-1852 | Castleblayney Poor Law Union Minute Book, 1842-1852. | |
| 4993 | National Archives of Ireland | 1045/5/4 | 1842-1855 | Unregistered forms of application for election of or... | Protestant Orphan Society |
| 8872 | National Archives of Ireland | 1045/5/4 | 1842-1955 | Unregistered Forms of Application for the Election o... | Protestant Orphan Society |
| 8944 | National Archives of Ireland | M6178/88 | 1842 | Papers relating to the Corranerary Estate of William... | Greville Estate Papers |
| 12185 | National Archives of Ireland | Thrift Abstracts 1384 | 1636 - 1842 | Nineteenth century extracts, includes details of Par... | Thrift Abstracts |
| 15486 | National Archives of Ireland | 999/89/1 | 1842 | Probate of Will of Sarah Browne, Baroginstown, Co. K... | Small Private Accessions |
| 169 | National Library of Ireland | Ms18625 | c1842 | Miscellaneous estate and household accounts [Farnham... | Farnham Papers |
| 1007 | National Library of Ireland | Mss12990-12991 | 1827-1842 | Journal recording monies received for William Gun Pa... | |
| 2313 | National Library of Ireland | Mss5465- 5466 | 1842, 1845 | Two rentals of the Irish estates of A Murray, Esq., ... | Irish Estates of A Murray |
| 2410 | National Library of Ireland | P3787-3788/N4116-4117 | 1726-1842 | Dominican Convent, Cabra, accounts: 1726-1739 Octobe... | Dominican Convent, Cabra |
| 2678 | National Library of Ireland | Ms16703 | c1842-1930 | Volume of autograph letters and signatures of many p... | |
| 2889 | National Library of Ireland | Ms8481 | 1836-1842
1673
1810 | Rentals and other papers relating to the Neville fam... | Neville Papers |
| 2474 | National Library of Ireland | Ms10181 | 1815-1842 | Letters of Elizabeth Ussher and other Quaker documen... | Ussher Papers |
| 2949 | National Library of Ireland | Ms8795 | 1842-1843 | Correspondence of James O'Donovan, County Cork and E... | |
| 2956 | National Library of Ireland | Ms8841 | 1837-1842 | Miscellaneous documents, 1837-1842, which include re... | Robert White Papers |
| 2958 | National Library of Ireland | Ms8844 | 1842 | Documents relating to mortgages, including copies of... | Robert White Papers |
| 2959 | National Library of Ireland | Mss8846-8847 | 1829-1842 | Documents relating to a case in Chancery of James Co... | Robert White Papers |
| 3478 | National Library of Ireland | Ms10658 | 1842 | Family letters and other documents of the Smyths of ... | Smyth Papers |
| 3622 | National Library of Ireland | Ms12787 | 1837-1842 | Rental and Accounts of the County Leitrim estate of ... | Leitrim Papers |
| 3627 | National Library of Ireland | Ms12809 | 1842-1843 | Rental of the Country Leitrim estate of the 2nd Earl... | Leitrim Papers |
| 6911 | National Library of Ireland | Ms18942 | 1842 | List of tenants on the lands of Herbertstown, barony... | Smyth Papers |
| 9444 | National Library of Ireland | Ms24637 | 1842-1861 | Papers of Henry Denehy and Lord Stewart relating to ... | Villiers-Stuart Papers |
| 9462 | National Library of Ireland | Ms24947 | 1842 | Autograph letter of Robert Holt Truell, Paris, to hi... | |
| 9585 | National Library of Ireland | Ms29791(1-17) | 1826-1842 | Rentals, Kilkenny, Tipperary, Waterford and Carlow e... | Bessborough Papers |
| 9728 | National Library of Ireland | Ms18242 | 1842-1849 | Accounts of Ambrose Bole and of William Dimond of tr... | Dimond Papers |
| 9762 | National Library of Ireland | Ms18429 | c1842-44 | Four notebooks of landlord's agents recording prospe... | |
| 10711 | National Library of Ireland | Ms17308 | 1765-c1842 | Miscellaneous collection, includes: List of the numb... | |
| 10765 | National Library of Ireland | Ms20304 | c1765-1842 | Letters to Charles O'Hara from members of the Trench... | O'Hara Papers |
| 11040 | National Library of Ireland | Ms18624 | 1842-1843 | Arrears due on the Farnham estate giving list of ten... | Farnham Papers |
| 18937 | Offaly Archives | OCL BG164/5 | 1842-1889 | Notes on Parsonstown Union Workhouse 1842-1889 | Records of Parsonstown Union |
| 18939 | Offaly Archives | OCL BG164/7 | 1842-1912 | Workhouse Records | Records of Parsonstown Union |
| 6278 | Public Record Office of Northern Ireland | BG/12/ | 1842-1955 | All board of guardian records are closed for 100 yea... | Downpatrick Board of Guardian Records |
| 6580 | Public Record Office of Northern Ireland | D/1665 | c.1842-1936 | This collection of c.50 documents, c.1842-1936, incl... | |
| 6647 | Public Record Office of Northern Ireland | D/1815/2 | 1842-1845 | D/1815/2/3 Notes on money collected for the benefit... | Atkinson Papers |
| 6279 | Public Record Office of Northern Ireland | BG/13/ | 1842-1948 | All board of guardian records are closed for 100 yea... | Dungannon Board of Guardian Records |
| 6301 | Public Record Office of Northern Ireland | BG/7/ | 1842-1951 | All board of guardian records are closed for 100 yea... | Belfast Board of Guardian Records |
| 6290 | Public Record Office of Northern Ireland | BG/23/ | 1842-1949 | All board of guardian records are closed for 100 yea... | Magherafelt Board of Guardian Records |
| 6754 | Public Record Office of Northern Ireland | D/2121 | 1842-1925 | These papers include miscellaneous rental books, mai... | |
| 7026 | Public Record Office of Northern Ireland | D/2577 | 1842-1849 | Personal and domestic account books and receipts of ... | |
| 7202 | Public Record Office of Northern Ireland | D/308/ | 1825-1842 | D/308/18; D/308/29 Marriage settlement and deed of s... | Fearon Papers |
| 7409 | Public Record Office of Northern Ireland | D/3959 | 1842-1986 | Records of John Dinsmore and Sons, Oldgreen Limited,... | |
| 7509 | Public Record Office of Northern Ireland | D/618/ | 1842-1916 | D/618/111 Journal of excursion to the England Lake D... | Savage Armstrong Papers |
| 7547 | Public Record Office of Northern Ireland | D/937 | 1842-1895 | Rainey Charity, Downpatrick, County Down: An account... | |
| 7858 | Public Record Office of Northern Ireland | T/1082/1-3 | 1832-1842 | 752 pages of copy typed letters of Charlotte Grierso... | |
| 8067 | Public Record Office of Northern Ireland | T/1650/1 | 1842-1846 | Copy of a diary giving a day to day account of the r... | |
| 2271 | RCSI Heritage Collections | LOAn/3/5 | c1841-1842 | Extensive Case Notes of Admissions to Dr Steevens Ho... | Dr Steevens Hospital Case Notes |
| 549 | Religious Society of Friends in Ireland Historical Library | Portfolio 34 | 1841-1842 | 3 Resignation of membership, Mary L Williamson and ... | Handlists/Portfolio |
| 676 | Religious Society of Friends in Ireland Historical Library | QMII/B5 | 1819-1842 | Women's Meeting: Minutes of the Women's Meeting, Mun... | Munster Quarterly Meeting |
| 768 | Religious Society of Friends in Ireland Historical Library | QMII/P1 | 1842 | Poor Committees and Charities: Rules for management ... | Munster Quarterly Meeting |
| 3553 | Religious Society of Friends in Ireland Historical Library | MM/XIIO1/Reel 20 | 1842-1903 | Disownment and Admission Register, Lisburn Monthly M... | |
| 3871 | Religious Society of Friends in Ireland Historical Library | Mss Box 45 | 1818-1842 | Grubb Collection: Letters, 1818-1842, concerning fam... | Handlists: Mss Boxes, Pamphlets Boxes, etc. |
| 4977 | Religious Society of Friends in Ireland Historical Library | MM/XIVC1/Reel 37 | 1829-1842 | Ministers' and Elders' Minutes, Grange, near Charlem... | |
| 4978 | Religious Society of Friends in Ireland Historical Library | MM/XIVC2/Reel 37 | 1842-1847 | Ministers' and Elders' Minutes, Grange, near Charlem... | |
| 5328 | Religious Society of Friends in Ireland Historical Library | MMVIII/R1 | 1842-1860 | History and Library: Library Committee Minutes, 1842... | Cork Monthly Meeting |
| 5335 | Religious Society of Friends in Ireland Historical Library | MMIX/R1 | 1826-1842 | History and Library: Library Committee Minutes, 1826... | Limerick Monthly Meeting |
| 11091 | Religious Society of Friends in Ireland Historical Library | PM/CorI/R1 | 1842-1860 | Cork Preparative Meeting, Library Committee Minutes,... | |
| 6187 | Religious Society of Friends, Waterford | Box3 | 1738-1842 | 2 7 November 1738, memorandum of Elizabeth Bourk wit... | Waterford Monthly Meeting Documents |
| 22396 | Royal College of Physicians of Ireland | | 1842-1865 | Roll of Fellows, Officers and Licentiates of Kings a... | Kings and Queens College of Physicians |
| 11888 | Sligo Archives Service | Shelf L | 1842-1933 | Ledgers of Sligo Corporation:1842-18711842-18781879-... | |
| 11880 | Sligo Archives Service | Shelf I | 1842-1928 | Sligo Corporation Minute Book, 1843-1854. Cemetery,... | |
| 11891 | Sligo Archives Service | Shelf J | 1842-1944 | Sligo Corporation Minute Books:1842-18691869-1888188... | |
| 5160 | Society of the Sacred Heart Provincial Archives, Ireland and Scotland | | 1842-1992 | Roscrea History Box containing: 1 Souvenir Centenar... | |
| 24289 | Tipperary County Archives | | 1842-1843 | Finance and Law Committee Reference Book, 1842-1843. | Clonmel Corporation |
| 24293 | Tipperary County Archives | | 1781-1842 | Box containing:Corporation Minute Book, 24 June 1786... | Clonmel Corporation |
| 24295 | Tipperary County Archives | | 1842-1849 | 'Index to the Reformed Corporation':1 Novemb... | Clonmel Corporation |
| 24322 | Tipperary County Archives | | 1829-1842 | Rent Roll of the Clonmel Corporation, 'n 12 L... | Clonmel Corporation |
| 24292 | Tipperary County Archives | | 1842-1990 | Corporation Minute Book:1 November 1842-8 July 18451... | Clonmel Corporation |
| 13109 | Tipperary Museum of Hidden History | AQNO1995.434 | 1842 | Lease, Viscount Lismore to Bridget Wade, Clogheen, 1... | |
| 1674 | Tipperary Studies | | 1842-1899 | 1 Spring Assizes 18424 Summer Assizes 18455 Summer 1... | Tipperary Grand Jury Records |
| 19812 | Tipperary Studies | | 1842-1898 | Rate Books:Ballycahill: January 1842 November 1843 D... | Thurles Local Authority Records |
| 6893 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs5105 | 1842-1862 | Family and personal accounts of children, kept by Ma... | Arnold Family |
| 10211 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs6430 | 1842-1861 | Commonplace Book belonging to Catherine Eliza Groves... | Groves Papers |
| 10272 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs5089b | 1842-1856 | Two letters to the Honourable Grace O'Brien, 1842, 1... | |
| 10354 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs3566 | c1842-1845 | Collection of songs belonging to Florinda and Julie ... | |
| 10437 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs6457g | 1842 | Travel Journal of Adelaide Hart, 1842, afterwards ma... | Dillon Papers |
| 11155 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs5089b | 1842-1856 | Two letters to the Honourable Grace O'Brien: 1842 18... | O'Brien Family |
| 11224 | Trinity College Dublin, Manuscripts and Archives Department | P 31/6/1-26 | 1842-1851 | H McCreery: Kilkenny Tenants Accounts, 1842-1851 and... | Courtown Papers |
| 5599 | UCD Archives | TU1 | 1842-1960 | Incorporating records of the Limerick Guild of Baker... | Irish Bakers', Confectioners' and Allied Workers' Union, Limerick |
| 13108 | University of Galway Archives | P3 | 1842
1845 | Spiritual writings, including retreat notes and repo... | |
| 22103 | University of Galway Archives | LE6 | 1842-1888 | Letters to Anne-Eliza Redington (nee Talbot) includi... | Wilson-Lynch Papers |
| 23344 | Waterford City Archives | P22/ | 1842-1902 | 1: Minute Book, Board of the Fanning Institute. Firs... | Records of the Fanning Institute |