[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 to William Reeves, discussing the problematic printing of the Annals.]

[Letter from John O'Donovan (36 Buckingham Street, Dublin) to William Reeves, discussing different Irish manuscripts.]

[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves (Parsonage, Ballymena, Co. Antrim), transcribing a manuscript passage about the burning of Rathmore by Edward Bruce.]

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

[Letter from John O'Donovan to William Reeves (Parsonage, Ballymena, Co. Antrim), describing his work on the Annals and commenting in passing on the Coercion Bill.]

[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), discussing Reeves's work, and deploring the decline of interest in Gaelic literature.]

[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves, commenting on grammar of an Irish motto and discussing Mr. Geraghty's bankruptcy.]

[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, discussing territories of ancient Irish clans.]

[Letter from Sean O'Dondubhain [John O'Donovan] to an unidentified recipient, discussing a passage in the Annals of the Four Masters and various translations of it.]

[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.]

[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.]