[List of queries in an unidentified hand, answered by John O'Donovan.]

Correspondence between John O'Donovan (1809-1861), and, principally, William Reeves (1815-1892): eighty letters (1832-1860) and twenty-six undated note fragments.

[List of queries in William Reeves's hand, answered by John O'Donovan.]

[Letter from William Reeves ([Parsonage], Ballymena, Co. Antrim) to John O'Donovan, concerning mainly Irish place names; includes O'Donovan's response.]

[Letter from William Reeves (Parsonage House, Ballymena, Co. Antrim) to John O'Donovan, concerning Irish place and family names; includes O'Donovan's response.]

[List of queries, probably in William Reeves's hand, mainly concerning places and names of clans, answered by John O'Donovan.]

[List of queries, probably in William Reeves's hand, answered by John O'Donovan.]

[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves, discussing the O'Neill genealogy and the Royal Irish Academy dispute.]

[Letter from John O'Donovan (36 Buckingham Street, Dublin) to William Reeves, discussing unsolved topographical questions.]

[Letters from John O'Donovan, Dublin to William Reeves (Diocesan School, Ballymena, Co. Antrim), discussing his and O'Curry's transcription of the Brehon Laws.]

[Letter from William Reeves ([Parsonage], Ballymena, Co. Antrim) to John O'Donovan, incorporating O'Donovan's response to queries.]

[Letter from John O'Donovan (36 Buckingham Street, Dublin) to William Reeves, concerning a number of genealogical and topographical questions.]

[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves (Parsonage House, Ballymena, Co. Antrim), discussing place names in Armagh and the state of antiquarian studies in Ireland.]

[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves (Ballymena, Co. Antrim), discussing difficulties of his work.]

[Letter from William Reeves (Ballymena, Co. Antrim) to John O'Donovan, concerning the translation of some extracts from the Annals of Ulster; includes O'Donovan's response.]

[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves, discussing territories of ancient Irish clans.]

[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves, discussing recent criticisms of their work on Irish place names.]

[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves, commenting on the lack of Irish political leadership and the disappearance of the Irish cultural inheritance under English rule.]

[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves, discussing building projects of the Gaelic aristocracy in Ulster.]

[Letter from John O'Donovan (36 Buckingham Street, Dublin) to William Reeves, discussing some copy-editing matters, and pointing out the forgeries of Shane O'Dugan's time.]

[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves, discussing the locality of Castle Drumtarsy.]

[Letter from John O'Donovan (36 Buckingham Street, Dublin) to William Reeves, discussing a number of Irish clans and their territories.]

[Letter from John O'Donovan (36 Buckingham Street, Dublin) to William Reeves, discussing Scottish place names and women's names.]

[Letter from John O'Donovan (36 Buckingham Street, Dublin) to Edmund Getty, sending some Belfast maps and translating some Irish names.]