| Ordnance Survey letters : Down. Letters containing information relative to the antiquities of the County of Down, collected during the progress of the Ordnance Survey in 1834 | NA | Monograph or Collective Volume | Fourmasters Press | 2001 |
| Ordnance Survey Letters : Galway. Letters relating to the antiquities of the county of Galway containing information collected during the progress of the Ordnance Survey in 1838 and 1839 | | Monograph or Collective Volume | Fourmasters Press | 2009 |
| Ordnance survey letters : Kilkenny, 1839 : Letters containing information relative to the antiquities of the county of Kilkenny | NA | Monograph or Collective Volume | Fourmasters Press | 2003 |
| Ordnance Survey Letters : Roscommon. Letters relating to the antiquities of the county of Roscommon containing information collected during the progress of the Ordnance Survey in 1837 | | Monograph or Collective Volume | Fourmasters Press | 2010 |
| Ordnance Survey letters Donegal : letters containing information relative to the antiquities of the County of Donegal collected during the progress of the Ordnance Survey of 1835 | NA | Monograph or Collective Volume | Fourmasters Press | 2000 |
| Ordnance Survey letters Dublin : letters containing information relative to the antiquities of the County of Dublin collected during the progress of the Ordnance Survey | | Monograph or Collective Volume | Fourmasters | 2001 |
| Ordnance Survey letters Dublin : letters containing information relative to the antiquities of the County of Dublin collected during the progress of the Ordnance Survey in 1837 | NA | Monograph or Collective Volume | Fourmasters Press | 2001 |
| Ordnance Survey letters Kildare : letters containing information relative to the antiquities of the County of Kildare collected during the progress of the Ordnance Survey in 1837, 1838 and 1839 | NA | Monograph or Collective Volume | Fourmasters Press | 2002 |
| Ordnance Survey Letters Limerick : letters relating to the antiquities of the County of Limerickd containing information collected during the progress of the Ordnance Survey in 1840 | | Monograph or Collective Volume | Fourmasters Press | 2014 |
| Ordnance survey letters Londonderry, Fermanagh, Armagh-Monaghan, Louth, Cavan-Leitrim; letters relating to the antiquities of the counties of Londonderry, Fermanagh, Armagh-Monaghan, Louth, Cavan-Leitrim, containing information collected during the progress of the Ordnance Survey in 1834-1836 | | Monograph or Collective Volume | Fourmasters | 2012 |
| Ordnance survey letters Longford and Westmeath; letters relating to the antiquities of the counties of Longford and Westmeath, containing information collected during the progress of the Ordnance Survey in 1837 | | Monograph or Collective Volume | Fourmasters | 2011 |
| Ordnance Survey letters Meath : letters containing information relative to the antiquities of the County of Meath collected during the progress of the Ordnance Survey in 1836 | NA | Monograph or Collective Volume | Fourmasters Press | 2001 |
| Ordnance survey letters Sligo : Letters relating to the antiquities of the county of Sligo containing information collected during the progress of the ordnance survey in 1836 and 1837 | | Monograph or Collective Volume | Fourmasters | 2010 |
| Ordnance Survey Letters Wexford : letters relating to the antiquities of the County of Wexford containing information collected during the progress of the Ordnance Survey 1840 | | Monograph or Collective Volume | Fourmasters Press | 2014 |
| Ordnance survey letters, Meath : Letters containing information relative to the antiquities of the county of Meath collected during the progress of the Ordnance Survey in 1836 | | Monograph or Collective Volume | Fourmasters Press | 2001 |