Letters from Adrian Munnelly, one as Registrar of Aosdána, discussing an annual report of activities by McGahern in relation to receiving the Cnuas payment (1986); Letters as Director of the Arts Council inviting McGahern to serve as a Board Member of the Tyrone Guthrie Centre. (1988). Includes MS and TS letters (2) by John McGahern in response to Munnelly's letters. (1986 and 1990).

Letters from Anne Morin to John McGahern, regarding her translation into French of his introduction to the Letters of John Butler Yeats, with comments and questions on the translation.

Letters form poet John Montague to John McGahern. Includes letters of feedback on a manuscript sent to Montague, with comments and comparisons on writing by Aidan Higgins (1961); a letter commenting on McGahern's terrible handwriting (1962); letter sending feedback having read The Barracks (1963); letter with details of a poem written by Montague and which could be dedicated to McGahern if he agreed; later letters and postcards through to 2001 discuss mutual writing projects and general conversation.

File of manuscript and typescript letters from Madeline McGahern to her husband, John McGahern. Letters are written mostly from Paris, France, and in Leitrim, Ireland, to John at locations including Hamilton, New York. They include personal family news, updates, and comments from recent family events and gatherings, comments on those who may have read John's books and given feedback, news of visits such as to Anne and Brian Friel, farming news, business updates from agents and re. books, travel plans to be with John and related personal discussions.

File of manuscript and typescript letters from Annikki Laaksi, first wife of John McGahern. Letters are all personal in detail and are written from Helsinki, Finland where stated. All relate to their relationship, marriage, time spent apart while McGahern was working in Hamilton, New York, family news and updates, visits with friends, travels, and later details and discussions regarding the breakdown of the marriage and later divorce.

File includes two manuscript letters from Mary Lavin to John McGahern, from 1985 and from 1989.

One letter and three postcards from Hermione Lee to John and Madeline McGahern. Postcards are all to John and thank John for his letter and for his essay on the Islandman, also comments on going to see a Field Day play in Ferry about Roger Casement. Letter to Madeline is in sympathy after the passing of John, and offers condolences and pays tribute to John McGahern.

Letters from Peter Lennon, one written on headed paper of The Listener, BBC, London, discussing McGahern's stories (1988); other letters regarding work and editorial changes at The Listener, Lennon's thoughts and comments on McGahern's books, including Memoir.

File of manuscript letters from Pierre Leiris, discussing McGahern's work, from The Dark to Nightlines, commentary on other literary matters.

File of letters from Michael and Edna Longley to John and Madeline McGahern, includes thanks for support in "the Hewitt affair", separate letter thanks McGahern for pulling out of a summer school over the incident and with detail on the situation (1996), meeting with the McGaherns in Denmark; comments after McGahern visited to Belfast (1979); Letter from Edna to John from her base in Sweden as a Visiting Professor, thanking McGahern for reading at a Festival and adding comments on Seamus Heaney's Nobel Prize win (1996); Letter from Edna to John inviting him to read at Queen's University Belfast (1978).
Card with poem "The Blackthorn" from Edna Longley, with added comments about the breakdown of marriage of John and Janey Banville; Poem from Michael Longley, "The Rainbow" with note sent to John (!999); Poem in dedication to John McGahern, "Hawthorn", by Michael Longley and sent to Madeline McGahern following the funeral of John McGahern. (2006).