| 6984 | Armagh County Museum | 1976/119 | 1840 | Notebook, Charlotte Campbell, 1840, 248 pages, conta... | |
| 6985 | Armagh County Museum | 1976/133 | 1840 | Circular, 'Death fo James Stuart Esq., L.L.D.... | |
| 13106 | Armagh County Museum | 1962/170 | 1841-1842 | Rent Book, Dartry estate, County Armagh for November... | |
| 13112 | Armagh County Museum | 1978/29 | 1843 | Monthly returns of warrants and arrests, Constabular... | |
| 13113 | Armagh County Museum | 1978/30 | 1843 | Monthly returns of warrants and arrests, Constabular... | |
| 16414 | Armagh Diocesan Archive (RC) | | 1840 | Material relating to the Diocese of Raphoe, includes... | Primate McGettigan Archive |
| 19120 | Armagh Robinson Library | Volume 7 | 1841 | A letter from Mrs Foster suggesting that her husband... | Primate J.G. Beresford Papers |
| 19121 | Armagh Robinson Library | Volume 7 | 1841 | A letter from Revd. W.H. Foster apologising for his ... | Primate J.G. Beresford Papers |
| 19124 | Armagh Robinson Library | Volume 7 | 1843 | A letter from H.L. Prentiss to Primate Beresford reg... | Primate J.G. Beresford Papers |
| 19127 | Armagh Robinson Library | Volume 8 | 1841 | A letter stating that Lady Elizabeth McClintock was ... | Primate J.G. Beresford Papers |
| 19132 | Armagh Robinson Library | Volume 8 | 1841-1843 | A petition of Mrs Susan James, Wexford, the wife of ... | Primate J.G. Beresford Papers |
| 19133 | Armagh Robinson Library | Volume 9 | 1841-1843 | Details on the parish of Loughgilly, 1841-1843, whic... | Primate J.G. Beresford Papers |
| 19137 | Armagh Robinson Library | Volume 10 | 1840 | A list of annual contributions in support of scriptu... | Primate J.G. Beresford Papers |
| 19140 | Armagh Robinson Library | Volume 11 | 1842 | A letter from Revd J.C. Crosthwaite to Mr Jones info... | Primate J.G. Beresford Papers |
| 16210 | Birr Castle Archives | A-W | 1843 | K/17: Includes a letter to 3rd Earl of Rosse from Ma... | The Rosse Papers |
| 16921 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1735
1823
1842 | Among material located in the filing cabinet:(5) (a)... | Bolton Library Archive |
| 16932 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1843 | 19th and 20th century correspondence, not catalogued... | Looney Collection |
| 4260 | Church of Ireland Centre | Ms692 | 1840-1843 | Inspector's Reports of the Model School, 1840-18... | Records of the Society for Promoting the Education of the Poor of Ireland |
| 4287 | Church of Ireland Centre | Serial No158 | 1840 | General Correspondence, III:Lady F. Cole to Committe... | Records of the Society for Promoting the Education of the Poor of Ireland |
| 4288 | Church of Ireland Centre | Serial No160 | 1840 | General Correspondence, III:Mary Jackson and Son to ... | Records of the Society for Promoting the Education of the Poor of Ireland |
| 4289 | Church of Ireland Centre | Serial No164 | 1840 | General Correspondence, III: Lady Dunraven to J. Top... | Records of the Society for Promoting the Education of the Poor of Ireland |
| 4290 | Church of Ireland Centre | Serial No172 | 1843 | General Correspondence, III:Miss J. Edkins to Commit... | Records of the Society for Promoting the Education of the Poor of Ireland |
| 19020 | Church of Ireland Centre | Box 36 | 1840 | Model School:Mod. 75 - Letter to Mrs Duncan from Ano... | Records of the Society for Promoting the Education of the Poor of Ireland |
| 19029 | Church of Ireland Centre | Box 36 | 1840 | Model School:Mod. 100 - 'School Assisted by the ... | Records of the Society for Promoting the Education of the Poor of Ireland |
| 17000 | Cloyne Diocesan Archive (RC) | Box B | 1840 | 1796.20/2/1840 They are prepared for reception of M... | Bishop W. Keane Papers |
| 17001 | Cloyne Diocesan Archive (RC) | Box B | 1841 | 1796.20/3/1841 Instruction for reception of Miss Ho... | Bishop W. Keane Papers |
| 17002 | Cloyne Diocesan Archive (RC) | Box B | 1843 | 1796.07/1/1843 Receipt for £1 from Mrs Duggan,... | Bishop W. Keane Papers |
| 17003 | Cloyne Diocesan Archive (RC) | Box B | 1843 | 1796.20/1/1843 Sermon prepared for reception of Miss... | Bishop W. Keane Papers |
| 17017 | Cloyne Diocesan Archive (RC) | | 1840 | 1793.05 2/1840 letter Bishop B Crotty, Cove, to Rev... | Bartholomew Crotty Papers |
| 17161 | Cloyne Diocesan Archive (RC) | Box X | 1840 | 1792.08/1/1840 Letter from J. Mullane, Liverpool, to... | Revd. Denis Collins |
| 17162 | Cloyne Diocesan Archive (RC) | Box X | 1840 | 1792.08/2/1840 Statement of intent relating to educ... | Revd. Denis Collins |
| 17018 | Cloyne Diocesan Archive (RC) | | 1842 | 1793.05/6/1842 extract from letter Rev. P Cullen to ... | Bartholomew Crotty Papers |
| 17019 | Cloyne Diocesan Archive (RC) | | 1843 | 1793.06/1/1843 photocopy of a letter M O'Sulliva... | Bartholomew Crotty Papers |
| 17163 | Cloyne Diocesan Archive (RC) | Box X | 1843 | 1792.08/1/1843 Letter of Miss E. MacSweeny, Calcutta... | Revd. Denis Collins |
| 3701 | Cork City and County Archives | U21 | 1841-c1843 | Notebook of Robert Bennett, Recorder of Cork on case... | |
| 23223 | Cork City and County Archives | U15B/ | 1842 | P/C 89 Charlotte Hewitt (aunt) to 'My dear Tom&#... | Thomas Hewitt Papers |
| 1397 | Cork Public Museum | AQNO1957:44 | 1843 | Sketch of a woman and child, crayon sketch at Carrig... | |
| 22928 | Delany Archive | Box Bp/10 File FH/1841/ | 1841 | 27. 31 July 1841 SC Propaganda Fide Rome, to Bishop ... | Papers of Dr Francis Haly, Bishop of Kildare & Leighlin |
| 22929 | Delany Archive | Box Bp/10 File FH/1840/ | 1840 | 14: 16 June 1840 Mrs Mary Price, Westfield Farm, to ... | Papers of Dr Francis Haly, Bishop of Kildare & Leighlin |
| 3147 | Dún Laoghaire-Rathdown County Council | LA1/258 | 1843 | Legal Records: Copy lease: Revd R.F. Vavassour, 1st ... | Blackrock |
| 21193 | King's Hospital School | 254-281 | 1840 | 261 Governors, List of, 1840. | King's Hospital Records |
| 18812 | Limerick Archives | BG 110 | 1842
1862-1875 | VIII. General Ledgers:BG/110/C/1. March 1842 - Septe... | Limerick Poor Law Union |
| 6986 | Limerick Museum | AQNO (0000.1894) | 1840-1841 | Poster. Account of the Governors and Governesses of ... | |
| 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 ... | |
| 13846 | Limerick Museum | AQNO (0000.4451) | c.1840 | Photograph. Glass slide. Object. Print, Wellesley Br... | |
| 14128 | Louth County Archives | | 1841 | Estate of the Right Honourable Sir A Foster. Particu... | |
| 20245 | Meath Local Studies and Family History Department | Box H/ | 1842 | 5 Memorial of deed between John Elvin and Charles Bl... | Mountainstown Documents |
| 20292 | Meath Local Studies and Family History Department | Box A/ | 1843 | 25 Essex and De Ros Estates, 1843. | Mountainstown Documents |
| 20302 | Meath Local Studies and Family History Department | Box A/ | 1841 | 7 Letter, 1841. | Mountainstown Documents |
| 20310 | Meath Local Studies and Family History Department | Box A/ | 1842 | 15 Letter to Arthur Pollock regarding rent, 1842. | Mountainstown Documents |
| 13148 | Monaghan County Library Genealogy and Local History Department | | 1852-1853, 1840-1843 | Photocopy of the manuscript Rent Book of the Newblis... | |
| 1858 | Monaghan County Museum | 1982:78 | 1843 | Grand Jury Accounts and Presentments 1843. | |
| 759 | National Archives of Ireland | 999/669 | 1841 | 6 June 1841, Census return for Florence McCarthy and... | |
| 8897 | National Archives of Ireland | M6933/10 | 1821
1822
1839
1840
1841 | Bundle of rentals of various portions of the Blake e... | Ballyglunin Papers |
| 8943 | National Archives of Ireland | M6178/79 | 1840 | Papers relating to the Corranerary Estate of William... | Greville Estate Papers |
| 8944 | National Archives of Ireland | M6178/88 | 1842 | Papers relating to the Corranerary Estate of William... | Greville Estate Papers |
| 11520 | National Archives of Ireland | | 1843 | Letter from Miss MacCarthy to the Misses Rossiter re... | Byrne Papers |
| 11523 | National Archives of Ireland | | 1841 | Letter from J. Horan to Mrs Cecilia Rossiter Byrne, ... | Byrne Papers |
| 15397 | National Archives of Ireland | 99/56/10/31 | 1841 | Papers relating to King's County. Castellammare ... | Family and estate records. 1611-1948 |
| 15398 | National Archives of Ireland | 99/56/10/32/1 | 1841 | Papers relating to King's County. Release for lives ... | Family and estate records. 1611-1948 |
| 15452 | National Archives of Ireland | 999/22/2 | 1841 | Marriage Settlement between Patrick Kain, Multifarna... | Small Private Accessions |
| 15486 | National Archives of Ireland | 999/89/1 | 1842 | Probate of Will of Sarah Browne, Baroginstown, Co. K... | Small Private Accessions |
| 15512 | National Archives of Ireland | 999/128/19 | 1840 | Lease for 21 years by the Right Honourable Lord John... | Small Private Accessions |
| 15533 | National Archives of Ireland | 999/141/8 | 1843 | Marriage licence for William Horan, Lismore and Cath... | Small Private Accessions |
| 169 | National Library of Ireland | Ms18625 | c1842 | Miscellaneous estate and household accounts [Farnham... | Farnham Papers |
| 1948 | National Library of Ireland | Ms8462 | 1841 | A poem on the Blessed Virgin by Felicia Heman with a... | |
| 2215 | National Library of Ireland | Ms10171 | 1826
1832
1843
1861-1862 | Papers and letters of the Ussher family of Cappagh, ... | Ussher Papers |
| 2313 | National Library of Ireland | Mss5465- 5466 | 1842, 1845 | Two rentals of the Irish estates of A Murray, Esq., ... | Irish Estates of A Murray |
| 2497 | National Library of Ireland | P8423/Ms8221 | 1830
1840 | Petition, 1840, to the Secretary of State for the Co... | |
| 2540 | National Library of Ireland | P1098/N1016 | c1840 | Includes many letters to Elizabeth Cole, c1840. Micr... | Ballitore Papers |
| 2748 | National Library of Ireland | Ms20951 | 1841 | Letter to John D'Alton from his son William, enclosi... | D'Alton Papers |
| 2756 | National Library of Ireland | Ms20,966 | 1841 | Two letters to Kate D'Alton of Dublin from her daugh... | D'Alton Papers |
| 2881 | National Library of Ireland | Ms1503 | 1843 | An account of the life of Daniel O'Connell by his da... | |
| 2949 | National Library of Ireland | Ms8795 | 1842-1843 | Correspondence of James O'Donovan, County Cork and E... | |
| 2958 | National Library of Ireland | Ms8844 | 1842 | Documents relating to mortgages, including copies of... | Robert White Papers |
| 2983 | National Library of Ireland | Ms9143 | 1841 | Includes a photocopy of a grant to Mary Thorp, widow... | |
| 2984 | National Library of Ireland | Ms9145 | 1841 | Photocopy of a lease by Samuel Thorp to Mary Thorp, ... | |
| 3478 | National Library of Ireland | Ms10658 | 1842 | Family letters and other documents of the Smyths of ... | Smyth Papers |
| 3627 | National Library of Ireland | Ms12809 | 1842-1843 | Rental of the Country Leitrim estate of the 2nd Earl... | Leitrim Papers |
| 6906 | National Library of Ireland | Ms18905 | 1840 | Letter of Michael Stacpoole, Milford [County Limeri... | Stacpoole Kenny Papers |
| 6911 | National Library of Ireland | Ms18942 | 1842 | List of tenants on the lands of Herbertstown, barony... | Smyth Papers |
| 9027 | National Library of Ireland | Ms13751(9) | 1840 | Nineteen letters to Richard Wilson Fitzpatrick from ... | Fitzpatrick Papers |
| 9345 | National Library of Ireland | Ms23810 | 1841 | Rate Book of the electoral division of Kilcash, Carr... | Ormonde Papers |
| 9462 | National Library of Ireland | Ms24947 | 1842 | Autograph letter of Robert Holt Truell, Paris, to hi... | |
| 9591 | National Library of Ireland | Ms29805(12) | 1843 | Bog book, Garryhill estate, Carlow, 1843. | Bessborough Papers |
| 9624 | National Library of Ireland | Ms27348 | 1843 | Ejectment orders on Byrne lands, Annefield estate, C... | O'Bryne Papers |
| 9635 | National Library of Ireland | Ms29767(16) | 1841 | Lease by John H Ryan to Anne Doyle, widow, and James... | Hibernian Mining Company Papers |
| 10102 | National Library of Ireland | Ms16409 | 1840-1843 | Rent Ledger of the Mullingar area, County Westmeath,... | Hodson Papers |
| 10773 | National Library of Ireland | Ms20375 | 1843 | Letter to Charlotte Streatfield, mostly relating to ... | O'Hara Papers |
| 10888 | National Library of Ireland | Ms21604 | 1840 | Draft of a petition of Henrietta Arnauld, Lismore, t... | Hodson Papers |
| 10892 | National Library of Ireland | Ms21703 | 1841 | Three letters of the O'Connell family, includes a no... | |
| 11040 | National Library of Ireland | Ms18624 | 1842-1843 | Arrears due on the Farnham estate giving list of ten... | Farnham Papers |
| 11551 | National Library of Ireland | MsG389/60 | [1843] | Letter to John (O) Daly from Harriet Madden, 26 July... | |
| 11587 | National Library of Ireland | Ms12370 | 1840-1843 | Castlebar Poor Law Union Rough Minute Book, 23 Janua... | |
| 11588 | National Library of Ireland | Ms12371 | 1840-1843 | Castlebar Poor Law Union Minute Book, 23 January 184... | |
| 21397 | Our Lady's Hospital, Cork | | 1843 | Copy of An Account of Salaries, 1843. | |
| 6339 | Public Record Office of Northern Ireland | D/11/1 | 1841 | Deed of trust by Anne Hall, Dublin: subscription of ... | |
| 6385 | Public Record Office of Northern Ireland | T/1801/6 | 1840 | Copy of a letter from Eliza Browne, Belfast to Maria... | |
| 7155 | Public Record Office of Northern Ireland | D/2966/40/1 | 1843 | Letter about wages in cotton mills in Glasgow and Be... | |
| 8099 | Public Record Office of Northern Ireland | T/1739 | 1840 | Copy of a subscription list for the erection of a sc... | |
| 7501 | Public Record Office of Northern Ireland | D/456/37 | c.1843 | Draft appeal by some ladies in Belfast to Lady Doneg... | Drennan Papers |
| 7769 | Public Record Office of Northern Ireland | MIC/32 | 1840-c.1843 | Draft letter from Mary Cunningham, Glenwood, [reject... | Cunningham (Belfast) Papers |
| 8181 | Public Record Office of Northern Ireland | T/2006/1 | 1841 | Certified copy of extracts from the 1841 census rela... | |
| 8211 | Public Record Office of Northern Ireland | T/2076/1 | 1843 | Copy of a letter from Amy Douglas, Newtownstewart, C... | |
| 8235 | Public Record Office of Northern Ireland | T/2146/1 | 1841 | Copy of a newspaper cutting from the Belfast News-Le... | |
| 8461 | Public Record Office of Northern Ireland | T/2746/1A-B | 1840 | 2 copies of a list of passengers on board the ship '... | |
| 8539 | Public Record Office of Northern Ireland | T/3036/6 | 1841 | Copy of a passenger list of emigrants on board the s... | |
| 8707 | Public Record Office of Northern Ireland | T/881/1 | 1841 | Copy of a portion of census return, including Mary M... | |
| 8538 | Public Record Office of Northern Ireland | T/3034/1-2 | 1840-1841 | Copies of two letters from Elizabeth McCleland, Dunr... | |
| 2271 | RCSI Heritage Collections | LOAn/3/5 | c1841-1842 | Extensive Case Notes of Admissions to Dr Steevens Ho... | Dr Steevens Hospital Case Notes |
| 548 | Religious Society of Friends in Ireland Historical Library | Portfolio 33 | 1840-1841 | 1 Certificate of Removal, Anne Grubb from Edenderry... | Handlists/Portfolio |
| 549 | Religious Society of Friends in Ireland Historical Library | Portfolio 34 | 1841-1842 | 3 Resignation of membership, Mary L Williamson and ... | Handlists/Portfolio |
| 768 | Religious Society of Friends in Ireland Historical Library | QMII/P1 | 1842 | Poor Committees and Charities: Rules for management ... | Munster Quarterly Meeting |
| 1292 | Religious Society of Friends in Ireland Historical Library | | 1841 | Dress and accessories: Wedding dress of Elizabeth Ha... | Museum Collection |
| 1338 | Religious Society of Friends in Ireland Historical Library | | 1840 | Temperance: Pledge, Father Matthew, signed by Cather... | Museum Collection |
| 4119 | Royal Irish Academy | 12/W/1 | 1843 | Oil painting on panel of Lady Morgan, painted in Lon... | |
| 13105 | Tipperary Museum of Hidden History | AQNO1995.410 | 1841 | Lease, Viscount Lismore to Mary Coughlan, Gurteenbeh... | |
| 13109 | Tipperary Museum of Hidden History | AQNO1995.434 | 1842 | Lease, Viscount Lismore to Bridget Wade, Clogheen, 1... | |
| 10271 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs5089a | 1836, 1838, 1840, no date | Correspondence of the Honourable Grace O'Brien, 1836... | |
| 10417 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs4998 | 1814
1843 | Prose translation of `Sintram' by Baron Fouque, c181... | Arnold-Forster |
| 10437 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs6457g | 1842 | Travel Journal of Adelaide Hart, 1842, afterwards ma... | Dillon Papers |
| 10508 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs3989 | 1841 | Anthology of poems concerning Conty Kilkenny familes... | |
| 995 | UCC Special Collections & Archives | BL/EP/G/184-204/A/5 | 1841 | Legal case papers including a number relating to wom... | Grehan Estate Collection |
| 13108 | University of Galway Archives | P3 | 1842
1845 | Spiritual writings, including retreat notes and repo... | |
| 13847 | University of Galway Archives | P14 | c1841 | A scrapbook, kept by a lady in c1841, containing pri... | |
| 19325 | Westmeath County Archives Department | | 1841 | 184 Richard Swift Esq. to Catherine Louisa Marlay, ... | Howard Bury Papers |
| 19339 | Westmeath County Archives Department | | 1843 | 266 Maria Gerrard and Elizabeth Gerrard, widow, 1st... | Howard Bury Papers |