| 13134 | Armagh County Museum | 1962/171 | 1849 | Rental estate of Lee McKinstry, 1849, includes tenan... | |
| 13854 | Armagh County Museum | 1965/126 | c1850 | Valentine, c.1850. | |
| 19142 | Armagh Robinson Library | Volume 1800-1849 | 1849 | An extract from the Armagh Guardian on the cons... | Dean Rennison Papers |
| 19022 | Church of Ireland Centre | Box 36 | 1849 | Model School:Mod. 82 - Female School, table showing ... | Records of the Society for Promoting the Education of the Poor of Ireland |
| 17009 | Cloyne Diocesan Archive (RC) | Box D | 1850 | 1796.05/1/1850 Letter, enclosure, Revd. M Sheehan, ... | Bishop W. Keane Papers |
| 17010 | Cloyne Diocesan Archive (RC) | Box D | 1850 | 1796.05/2/1850 Handwritten extracts from A Gould's ... | Bishop W. Keane Papers |
| 17011 | Cloyne Diocesan Archive (RC) | Box D | 1850 | 1796.05/3/1850 Letter, Revd. M Sheehan, Youghal to ... | Bishop W. Keane Papers |
| 17012 | Cloyne Diocesan Archive (RC) | Box D | 1850 | 1796.05/4/1850 Letter, Revd. M O'Brien, Mitchelstow... | Bishop W. Keane Papers |
| 17013 | Cloyne Diocesan Archive (RC) | Box D | 1850 | 1796.05/5/1850 Letter. Revd. M O'Brien, Mitchelstow... | Bishop W. Keane Papers |
| 17108 | Cloyne Diocesan Archive (RC) | Box J | 1850 | 1796.06/56/1858 Note `Foundation of the Convent of ... | Bishop W. Keane Papers |
| 17014 | Cloyne Diocesan Archive (RC) | Box D | 1796
1850 | 1796.05/6/1850 Letter, Revd T. Lee, Macroom, to Revd... | Bishop W. Keane Papers |
| 17015 | Cloyne Diocesan Archive (RC) | Box D | 1850 | 1796.05/7/1850 Letter, Revd M. O'Brien, Mitchels... | Bishop W. Keane Papers |
| 17029 | Cloyne Diocesan Archive (RC) | Box B | 1850 | 1795.06/1/1850 Letter Angelina Gould Youghal to Rev.... | Timothy Murphy Papers |
| 17030 | Cloyne Diocesan Archive (RC) | Box B | 1850 | 1795.07/16/1850 Letter from a parishioner of Mr Davi... | Timothy Murphy Papers |
| 17031 | Cloyne Diocesan Archive (RC) | Box B | 1850 | 1795.05/60/1850 Letter from the Rev. O'Hea, Rosscarb... | Timothy Murphy Papers |
| 17032 | Cloyne Diocesan Archive (RC) | Box B | 1850 | 1795.03/2/1850 Letter from Bishop Murphy, Adelaide t... | Timothy Murphy Papers |
| 23222 | Cork City and County Archives | U15B/ | 1849 | P/C 79 Lucy Gibbons (no address given) to Hewitt, 30... | Thomas Hewitt Papers |
| 23221 | Cork City and County Archives | U15B/ | 1850 | P/C 61 L. Dubos, Brentford Butts, Seagrave Place, Bo... | Thomas Hewitt Papers |
| 21725 | Kerry Diocesan Archives (RC) | E59 | 1850 | Cholera in Cahirciveen, Mother Joseph, 1850. | Bishop Cornelius Egan, 1825 - 1856 |
| 21727 | Kerry Diocesan Archives (RC) | E62 | 1850 | Mother Joseph, 1850. | Bishop Cornelius Egan, 1825 - 1856 |
| 13132 | Kilmainham Gaol Museum | 5CN-1C15-3 | 1849 | Commemorative medal, royal visit of Victoria and Alb... | Famine and Young Ireland |
| 13133 | Kilmainham Gaol Museum | 5PH-1C33-19 | 1849 | Food ration form for females in custody, Kilmainham ... | Famine and Young Ireland |
| 20994 | King's Hospital School | 65-82 | 1850 | 78 Chadwicks Noddstown, 1850. | King's Hospital Records |
| 20589 | Meath Local Studies and Family History Department | Box E/ | 1849 | 26 Lease of land to Matthew Sheridan at Raffin by Ra... | Mountainstown Documents |
| 20611 | Meath Local Studies and Family History Department | Box E/ | 1849 | 22 Deed between Edward Bligh, Brittas, administrator... | Mountainstown Documents |
| 21513 | Monaghan County Museum | | 1849 | I102 Photocopy letter and envelope. E.I. Foster to M... | Moorehead Letters |
| 21514 | Monaghan County Museum | | 1849 | J1-4 Photocopy letter and envelope. E.I. Foster to M... | Moorehead Letters |
| 21515 | Monaghan County Museum | | 1850 | K1-3 Photocopy letter and envelope. E.I. Foster to M... | Moorehead Letters |
| 21516 | Monaghan County Museum | | 1850 | L1-2 Photocopy letter and envelope. Unsigned to Mart... | Moorehead Letters |
| 21517 | Monaghan County Museum | | 1850 | M1-3 Photocopy letter and envelope. E.I. Foster to M... | Moorehead Letters |
| 21518 | Monaghan County Museum | | 1850 | N1-3 Photocopy letter and envelope. E.I. Foster to M... | Moorehead Letters |
| 21590 | Monaghan County Museum | | 1850 | 1988 103a-b3 letter dated 12 /Feb/ 1850 and signed M... | Moorehead Letters |
| 3930 | National Archives of Ireland | | 1850 | Maps and Plans: Hospital Etching of the Chapel Ceili... | Royal Hospital Kilmainham |
| 11987 | National Archives of Ireland | | 1849 | Proclamation number 485. Female prisoners now in New... | Printed Proclamations |
| 15328 | National Archives of Ireland | 99/56/5/6 | 1850 | Carhampton Papers. Portarlington and members of the ... | Family and estate records. 1611-1948 |
| 15499 | National Archives of Ireland | 999/113/4 | 1850 | Copy surrender of lease for remainder of 300 years b... | Small Private Accessions |
| 23991 | National Archives of Ireland | CIF L3/1850 | 1850 | William Lavery assault on his wife. It was noted tha... | Criminal Index Files |
| 964 | National Library of Ireland | Ms11354 | 1849
1852 | Letters to Mary Trench, including: Two letters from... | Domvile Papers |
| 2363 | National Library of Ireland | Ms12932 | c1850 | Susanna Barclay, medical receipts. Indexed book of r... | |
| 2498 | National Library of Ireland | Ms13400 | c1850 | Documents, mainly letters to Lord and Lady Monteagle... | Monteagle Papers |
| 2563 | National Library of Ireland | Ms4593 | 1849 | Negative photostat copy of a letter from James Mourn... | |
| 2876 | National Library of Ireland | Ms465 | 1849 | Poems by 'Eva' (Mary Anne O' Doherty) of 'The Nation... | |
| 2928 | National Library of Ireland | Ms8659 | 1849 | Journal (for Mrs O'Brien) of a convict's voyage to T... | William Smith O'Brien Papers |
| 3076 | National Library of Ireland | Ms10074 | c1850 | Statement of costs in the case of the estate of Rich... | |
| 3078 | National Library of Ireland | Ms14089 | c1850 | List of leases relating to the estates of the 4th Ea... | |
| 3617 | National Library of Ireland | Ms13136 | 1849 | Nine miscellaneous documents relating to William S O... | De Vere Papers |
| 3620 | National Library of Ireland | Ms12766 | 1850 | Ennistymon (County Clare) Union Letter Book, mostly ... | |
| 6922 | National Library of Ireland | Ms12612 | 1849-1850 | Westport Poor Law Union Minute Book, 10 November 184... | |
| 9239 | National Library of Ireland | Ms15558 | 1850 | Xerox copies of two letters from William Cleburne, C... | |
| 9267 | National Library of Ireland | Ms15763 | 1837-1843
1850
1853 | Correspondence of Viscount and Lady Hardinge, 1837-1... | |
| 9556 | National Library of Ireland | Ms29770(97) | 1849 | Assignment of a third part of the lands of Tomgarrow... | Doyne Papers |
| 9557 | National Library of Ireland | Ms29770(99) | 1849 | Brief on behalf of John Jones, Robert Doyne and Maxw... | Doyne Papers |
| 9731 | National Library of Ireland | Ms18246 | 1849-1850 | Account of surveys of holdings in County Longford, s... | Dimond Papers |
| 10096 | National Library of Ireland | Ms16388 | 1849 | Rent Ledger of the estates of Lord Louth in the Baro... | |
| 10893 | National Library of Ireland | Ms21708 | [c1850?] | Letter from 1st Marquis of Dufferin of Ava relating ... | |
| 10935 | National Library of Ireland | Ms22249 | [c1850?] | Letter from M Martin, Dublin to [Mary --?] concernin... | |
| 11583 | National Library of Ireland | Ms12208 | 1849 | Ballina Poor Law Union Rough Minute Book, 28 Septemb... | |
| 11584 | National Library of Ireland | Ms12209 | 1850 | Ballina Poor Law Union Minute Book, c2 February 1850... | |
| 11602 | National Library of Ireland | Ms5739 | 1849-1850 | Minute book of Newport Union of Poor Law Commissione... | |
| 6729 | Public Record Office of Northern Ireland | D/2069 | 1849 | 1 letter from A.Y. Parkket, Brompton to Margaret Cla... | |
| 7545 | Public Record Office of Northern Ireland | D/906/ | 1850
1857 | D/906/365/1 An account of an Irish woman's visit... | Perceval Papers |
| 7804 | Public Record Office of Northern Ireland | MIC/65/2 | 1850 | Microfilmed copy of the commonplace book of press cu... | Rowan-Hamilton (Killyleagh) Papers |
| 7924 | Public Record Office of Northern Ireland | T/1233/1 | c1850 | Copy of a map of Hamiltonsbawn, County Armagh, showi... | |
| 7969 | Public Record Office of Northern Ireland | T/1362/1 | 1849 | Copy of an emigrant letter from Richard Breathwait, ... | |
| 8019 | Public Record Office of Northern Ireland | T/1509/1 | 1849 | Copies of an emigrant letter from Richard Breathwait... | |
| 8203 | Public Record Office of Northern Ireland | T/2054/1 | 1850 | Copy of a letter from Mrs Nolan, Clara Upper, County... | |
| 8360 | Public Record Office of Northern Ireland | T/2518/1-3 | 1153-1852
1849 | Genealogical table with notes on the Kennedy family,... | |
| 8397 | Public Record Office of Northern Ireland | T/2613/16 | 1849 | Copy of an emigrant letter from Mrs Charlotte Graham... | |
| 8578 | Public Record Office of Northern Ireland | T/3664 | 1850 | Copy of a letter from Marianne Gurd, Montreal, Canad... | |
| 4193 | Religious Society of Friends in Ireland Historical Library | Deed Box XIV/Folder 3:6 | 1850 | Elizabeth Haughton, Carlow: Signature to surrender o... | Deeds |
| 13850 | Sligo Archives Service | | 1850 | Rental of the estate of Godfrey Brereton in the baro... | Brereton Estate |
| 13851 | Sligo Archives Service | Estates volume 5 | 1850 | Rental of the Sligo estate of Henry Irwin (with maps... | Irwin Estate |
| 13852 | Sligo Archives Service | Estates Volume 5 | c1850 | Rental of the estate of Jeremiah Jones in the barony... | Jones Estate |
| 13853 | Sligo Archives Service | | c1850 | Rental of the late Owen Lloyd, c. 1850. | Lloyd Estate |
| 13140 | Tipperary Museum of Hidden History | AQNO1995.496 | 1850 | Lease, Viscount Lismore to Grace Heffernan, Coolanur... | |
| 13141 | Tipperary Museum of Hidden History | AQNO1995.504 | 1850 | Lease, Viscount Lismore to Ellen Flynn, Bantyre, 185... | |
| 19486 | Tipperary Studies | | 1849 | Rate Books:Ardmayle Rate Book 1849Ardsallagh Valuati... | Cashel Poor Law Union |
| 10411 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs5116 | 1798
1850
1856
1911 | Account of the rebellion of 1798 in Wexford dicated ... | Arnold Family |
| 10439 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs6461 | c1849 | Verse Notebook inscribed for Ady D [Adelaide Dillon]... | Dillon Papers |
| 11162 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs5097/30-1 | 1849 | Returns of defaulting tenants on Clare estate, 1849. | O'Brien Family |
| 3675 | UCC Special Collections & Archives | U268 | 1848
1849
1961 | Death certificate of Hannah Green, aged 15, daughter... | |
| 19187 | Westmeath County Archives Department | | 1849-1850 | Mullingar Poor Law Union Reports:9 August 1849-28 Fe... | Mullingar Poor Law Union |
| 19298 | Westmeath County Archives Department | | 1850 | 24 Copy of settlement on the marriage of Robert Gerr... | Howard Bury Papers |