Manuscript map of the floor plan and external grounds of the Barracks at Cootehall, drawn by John McGahern.

Files of manuscript and typescript letters from John McGahern to various including writers, editors, family, and friends.
These are the original letters which are transcribed and published in "The Letters of John McGahern" edited by Frank Shovlin (Faber and Faber 2021). The files of letters present include from John McGahern to:
Patsy Murphy, Tom Callan, Jimmy Swift, Anne Annerson, Susannah Cappon, Patrick Gregory, Debbie Newt (Colgate), Neil and Mary Joy, Brian Friel, Nicholas and Eleanor Grene, Madeline McGahern, Mr. Charleton, Jason Epstein, Matthew Evans, Peter Lennon, Dympna McGahern, Tony Swift, Patrick Gregory, Stanley Van Der Ziel, Faber and Faber (re. Ligne de Fond Cover), Clare Rehill Robertson, J.D. Langton and Passmore (Colgate), Mary Keelan, Charles Monteith, Maggie Pernod, Donald, Ian Jack, Mary Kay Wilmer, and Dolores Cleary. Letter to a Sophie [ ], with comment "letters ...are never quite honest".
Also a piece of manuscript quotation by McGahern, with labelling as being "...Quoting Critique of "Walking along the Border".

A set of index cards outlining some of the local features of the townland of Gowlaunlee, [Gabhlán na Lí]. Some summary notes from O'Donovan's name books, Griffith's Valuation, and the Placenames Department of the OS. Also included are summary descriptions of Birallate rath, Binn, Mám a Tuirc Móir, Gabhlain Ard, a note on the King Cottages (and Mr. King who was involved in the 1921 Munterowen ambush between the IRA and RIC), a note on Cillín (a children's burial ground), Anacair, Taobh Bán, Mám Ochóige, Mám Tuirc, and a detailed note on Pádraig Ó'Máille's cave (and a detailed sketch). The cave dates back to Spring 1918, and was used as a hideout by IRA leaders in the ensuing years.

A set of index cards outlining some of the local features of the townland of Kilmeelickin [Béal Átha na mBreac/Coill Mhíolcon]. Included are a note on the O'Malley family, a detailed note on the history of the Chapel from its construction in 1840. The note includes a list of clergy there until the early 20th century. Also included are a brief description of D'al a Choltair, Marfaigh (a hilside with a line of cliffs), Binn Mhór, Béal Átha na mBreac, and a beehive quern. Kevin Joyve of Recess, Paul Gosling, and Nora Keane of Mám are credited as providing some of the information gathered for this townland.

A set of index cards outlining briefly some of the local features of the townland of Poundcartron, [Cartrún an Phóna]. Included are descriptions of Cúlóg, Tigh Bairín, Éadan Bán, Sián, a row of four milk-white quartz boulders known as Stone Row, and a Fulacht Fiadh.

Two index cards detailing some of the local features of the townland of Drumsnauv, [Droim Snámha]. A description of Castlekirk and Doon House is included here, some of the information having come from Patrick Melvin of the Oireachtas Library in Dublin 2.

A set of index cards detailing some of the local features within the Civil Parish of Ross (some of these are in Co. Mayo). Included are a note on the Anglican Episcopalian Church of St. John the Baptist, and its rector Robert McKeown. A detailed note is included of Magairlí an Deamhain (the peak Devilsmother). Aasleagh Falls (the site of the murder in the film 'The Field), Gleann na nÉan, Inishdegil. A note on the Baptismal Font in Aasleagh, dedicated to the beloved and esteemed memory of the Honorary David Plunkett who died in 1868, and a list of the memorials inside the Church at Aasleagh. Also a note on Eas Rua, Maumetrasna, Erriff River, and Aasleagh Lodge.

Set of index cards detailing some of the local features of the townland of An Cheathrú Rua Thuaidh[Carrowroe North]. A note on the Carraroe Riots (at the centre of agrarian unrest in 1880), Caladh Thaidhg (and some biographical information about Tadhg Ó'Catháin), Céibh Doire Uí Fhathartaigh Mór, Crompán an Aill Mhóir, Corrántaí, Leacht an tSapair, Cuan Tuairín, Céibh Doire Uí Fhatharta Beag, An Chara, An Meall, Cladach Chuilleáin, Carraig an Liagáin, Caorán an Tuairín, Loch an Bhric Mhóir, Cora na Móna, Doire Uí Fhathartaigh, Cuilleán, Aill an Chiardhubháinigh, Loch na Tamhnaí Móire, Carraig an Ime (where local people cut seaweed), Tuarín Garbh, Na Lathaí Dubha, Loch na Tamhnaí, Loch na Cora Dóite, Tamhnach Thomais Fhada, Cloch na Toirní, Na Portaigh, Loichín na Meacan, Loch Leacrach, Cora na bPáistí, Loch Gleann an Fhir Mhairbh, Oileán an Phriosúin, Crompán an Ghainimh, Caladh na Siongán, Teach an tSalainn, and Loichínna Scailpe. Micheál Ó'Máille, Peadair Lambe, Liam McDonncha, and Bean MhicDonncha are credited as being local sources of information.

Set of index cards detailing some of the local features of the townland of Daighinis/Daimh Inis, [Dinish Island]. Only two households remain (the MacDonnchas and Loftus family), Several local features are described, including Na Seanbhallaí Dhaighnis, Crompán Sheanáit, Duirling an Chadáis, Bóthar na Naomh, na Binseacha, Muc Ghain Dhaighnise, Trá na Dumhaí Bige, Leic an tSoiligh, Bealach Dhaighnis, Scailp na Ceilpe, Carraig an Chlaímh, Leac na Scardáin, Cloch an tSeoil, Leac na bhFaoileán, An Duirling Mhór, Cora Dhubhail, Carraig an Duibhéin, Lochán na gCapall, An Trá Mhóir, Bruiser Rock, and Duirling an Eabhair. Tom Loftus and Tom Lee are credited as being local sources of information.

Set of index cards detailing some of the local features of the townland of Derrough South, [Na Doiriú Theas]. A note on Loch an Fhiolra, Loch na hOige, Doire Iochtair, Cnoc na nDoire, and An Caorán.