[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.]
[Two letters and two notes from John O'Donovan (36 Buckingham Street, Dublin) to William Reeves, discussing the identity of Berichter according to the Irish annals, and generally highlighting the importance of antiquarian studies.]
[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves (Parsonage House, Ballymena, Co. Antrim), discussing the meaning of some Irish words, particularly from the Belfast bell inscription.]
[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves, discussing in particular the inscription of a bell in Belfast.]
[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves, returning answers to some queries and discussing work on the Annals.]
[Letter and note from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves (Ballymena, Co. Antrim), discussing the O'Neill and O'Donnell genealogies.]
[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves (Parsonage House, Ballymena, Co. Antrim), concerning his work, health and his desire to emigrate to America.]
[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves (Parsonage House, Ballymena, Co. Antrim), discussing his work and his impending move to Belfast.]
[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves, requesting a third opinion on deciphering MacDonnell's deed, and discussing the current census and the state of the Irish language.]
[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 Joannen Donovaniden [John O'Donovan] (Ulster Railway Hotel, Belfast, Co. Antrim), to William Reeves (The Vicarage, Lusk, Co. Dublin), discussing the Dinnsenchus of Armagh.]
[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves (Parsonage, Ballymena, Co. Antrim), enclosing some answers to queries, and discussing John O'Neill's genealogy.]
[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves (Parsonage, Ballymena, Co. Antrim), returning answers to Reeves's queries and reporting on his own work on the Annals of the Four Masters.]