Letter from Peadar Ua Laoghaire, Caislean Ua Liathain, Co. Chorcaighe to Seaghán Mac Énrí, discussing the Irish for "underground passage", as well as the wiseness of emphasising distinct dialects within Irish [in Irish].

Letter from Peadar Ua Laoghaire to Seaghán Mac Énrí in relation to some irregular verbs, with Peadar's replies [in English and Irish].

Letter from Peadar Ua Laoghaire to Seaghán Mac Énrí,discussing the use of interrogatories in Irish [in Irish].

Letter from Peadar Ua Laoghaire, Sea View Cottage, Ballycotton, to Seaghán Mac Énrí, thanking him for his letter and hoping he will have many more years.

Notes on grammar and vocabulary by Micheal Breathnach to Dr. Mac Énrí, relating to the "Handbook of Modern Irish" [in Irish].

Handwritten draft of three poems by Micheal Breathnach (Torna). They are "Loch Lein", "A Phuisin, A Phusin" and "Is maith liom mo chircin" [in Irish].

Script of lecture entitled "The Principles of the Direct Method" delivered by Dr. Mac Énrí to the inspectors and organisers of the National Board of Colaiste Laighean. In it he discusses the best method of teaching Irish to children.

Handwritten draft of part of "Handbook of Modern Irish" by S.P. Mac Énrí, containing additions and amendments to the text.

Various papers relating to regional planning in the West of Ireland.

Notebook containing rough notes of Prof. Ó Nualláin's during his visit to the University of Pennsylvania, mainly relating to academic work on analysis of economics.