[Letter from John O'Donovan (47 Essex Street, Dublin) to George Petrie (21 Great Charles Street, Dublin), discussing the meaning of some Irish words, as well as Cormac Mac Cullenan's will.]

[Letter from John O'Donovan (36 Buckingham Street, Dublin) to William Reeves, discussing the forthcoming elections in Trinity College, Dublin.]

[Letter from John O'Donovan (36 Buckingham Street, Dublin) to William Reeves, discussing the meaning of the Irish word buidechuir.]

[Letter from John O'Donovan (36 Buckingham Street, Dublin) to William Reeves, concerning Count Charles MacDonnell's letter.]

[Letter from John O'Donovan (36 Buckingham Street, Dublin) to William Reeves, concerning a request from Robert MacAdam, and discussing Reeves's work on Life of Patrick.]

[Letter from John O'Donovan (36 Buckingham Street, Dublin) to William Reeves, asking for financial advice.]

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

[Notes from a manuscript giving the names of the leaders of the Leinster families during the reign of Queen Elizabeth I.]

[Letter from John O'Donovan (8 Newcomen Place, North Strand, Dublin) to William Reeves, discussing the provenance of the Belfast bell, and referring to an internal dispute in the Royal Irish Academy.]

[Letter from John O'Donovan (Trinity College, Dublin) to William Reeves (Lusk, Co. Dublin), discussing the Irish names for the names of the week.]

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

[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.]