1. O'Dempsey's Country
  2. The Territory of Ancient Offaly
  3. The Territory of Ancient Offaly II
  4. The Traditions of Clonsast
  5. 4th Letter
  6. The History of Killeigh
  7. O'Molloy's Country of Fear Ceall
  8. The Battle of Moylena
  9. Index of Ordnances Survey Letters
  10. Ordnance Survey Letters for Offaly 1838
  11. Eiscir Riada and the Edenderry District
  12. Lynally and Rahan
  13. Treasure in Ballykillan
  14. Killoughy and the Hill of Croghan
  15. Croghan Hill
  16. Tullamore River, Killurin and Ballintogher
  17.  Ballycowan and Sragh Castles
  18. Kilbride (Clara), Ballyburley, Killclonfort and Ballycommon
  19. Durrow and Geashell - The English Authorities Attacked
  20. "A County of Bogs and Morasses"
  21. Castles in West Offaly
  22. Did A Gallogoly Kill Hugh De Lacy?
  23. Clonmacnoise (1)
  24. Clonmacnoise (2)
  25. Clonmacnoise (3)
  26. Clonmacnoise (4)
  27. Clonmacnoise (5)
  28. Lusmagh - The Plain of Herbs
  29. Gallen and Clonony
  30. Hugh de Lacy's murder at Durrow in 1186
  31. Leamanaghan
  32. The Castles of Mac Coughlan's Country
  33. The Will of Sir John Coghlan
  34. The Boundries of O'Molloy Country of Fear Ceall (1)
  35. The Boundries of O'Molloy Country of Fear Ceall (2)
  36. Fearcall - (From the Inquisitions). Castlegeshill, 23 Oct., 1612. (8 Jac I.).
  37. O'Molloy Chief killed by a beggar
  38. Rahan in Ancient Meath
  39. Banagher and Cloghan
  40. John O'Molloy of Eglish - The Soogan Chief
  41. John O'Donovan and T.L. Cooke
  42. The Name Banagher
  43. The Old Church at Drumcullen
  44. Seir Kieran
  45. T.L. Cooke - "A Good Rogue and Sound Historian"
  46. Offaly Placenames
  47. Kilcolman Church
  48. Kinnitty
  49. Kinnitty Parish
  50. Placenames In Fear Ceall and Ballyboy
  51. Ballybritt and Leap Castle - A Liar at Leap
  52. Rathleen, Killoughey
  53. Rahan and Roscore
  54. The Extent of Ely O'Carroll
  55. The Cantreds of Ely O'Carroll
  56. The Genealogy of the O'Carrolls
  57. Ely O'Carroll
  58. Kilcomon Old Church
  59. Dunkerrin District
  60. Stories of the Offaly Saints
  61. Extent of the Dioceses in King's County
  62. Shinrone and District
  63. Townland of Litter and Cadamstown
  64. Durrow (1)
  65. Durrow (2)


The Ordnance Survey Letters for County Offaly, part of a country wide series, are commonly known as O'Donovan's Ordnance Survey Letters, after John O'Donovan, the famous historian.

The Ordnance Survey Letters of 1837-1838 represent the first attempt on a systematic basis to collect material on Offaly's historical and archaeological remains. The pioneering effort of the Ordnance Survey and of its topographical department in particular was not emulated until the publication some 150 years later of the Archaeological Inventory of County Offaly. O'Donovan's Ordnance Survey Letters are in manuscript form in the Royal Irish Academy and were published in a typescript by Fr. Michael Flanagan in 1933.

The Offaly material consists of letters of John O'Donovan and of Thomas O'Conor. O'Conor, a native of Carrickmacross, was assistant to O'Donovan. Both men had spent September, October and November of 1837 in County Westmeath and in late December of 1837 their attentions turned to Offaly, then and until 1920 called King's County. The letters concern local antiquities, place-names, early Irish history and the genealogy of the native families

It should be noted that in the Westmeath letters are one of John O'Donovan's from Tullamore and another from Edenderry. That from Tullamore is dated 1st January 1838 and could properly be in the King's County volume.