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).

File of letters and one postcard from Professor Liliane Louvel, Université De Poitiers, France, discussing her work, McGahern's books, French and Irish writing.

Two postcards from Liam Keaveney to John McGahern, sending good wishes.

MS letters from Tom and Peggy Leen, sending personal good wishes, news of McGahern family members, and comments on the public attitude to McGahern's books, from The Barrack to the Dark and later public attitudes towards McGahern that he encounters in the local pub.

Letters from Joe Kennedy, journalist and friend of John McGahern.

Manuscript letters from poet Brendan Kennelly, (Trinity College Dublin headed paper) to John McGahern, following up with comments following a reading by McGahern at Trinity College Dublin (1978). Letter, 1985, thanking McGahern for a copy of "High Ground" nd adding comments on the book.

File of letters from academic and critic Declan Kiberd to John McGahern, discussing a range of topics, including John's books and writing, an invitation to be Writer in Residence at University College Dublin within Kiberd's department, readings at the Yeats Annual Summer School (which Kiberd directed at the time), and wider discussions around Irish writing and literature.

Letters from playwright Thomas (Tom) Kilroy to John McGahern. Letters include comments from Kilroy on McGahern's play, "The Power of Darkness" and that Field Day should develop the play; Comments on his own play, "Double Cross" and on Field Day Theatre Company; trips to Ballinrobe Race; arrangements to meet up with the McGaherns; Comments about Aosdána; early retirement from University College Galway; comments on Dublin theatre and audiences in early 1990s; Garry Hynes at the Abbey Theatre; comments on the visit of President Ronald Reagan to Ireland; updates on Kilroy's plays at the Royal Court, London; visiting the Friels; book prizes; and other comments on Irish writing and culture. Also includes page from unnamed magazine, with photos and coverage of Kilroy and his novel, The Big Chapel.

File of manuscript letters from Frances Kiernan, editor at the New Yorker magazine, discussing stories submitted to or considered by/published by the magazine and written by McGahern, including Gold Watch, The Rockingham Shoot, An Oldfashioned Story, The Natural Process, Sierra Leone, The Big Stone House, Without Ceremony, and other stories. Also personal conversations on family news, readings, events, and visits to New York and other works/novels by McGahern.

Letters from Sonny Mehta at Knopf Publishers, New York, with details and publication updates on US editions of McGahern's books, including "By the Lake" (Memoir). One letter notes that the Queen Mother (UK) rejected an appeal to use an unnamed painting on the book jacket. Emails of reply from John McGahern included.