1 Mac an Bheatha's involvement in the Irish language movement 1. Conradh na Gaeilge- Craobh na hAiséirí
1.1 Constitution
1.2 Membership
1.3 Minutes
1.4 Accounts
1.5 Publications
1.6 Correspondence and press item
1.7 Theatre programmes

2 Mac an Bheatha's involvement in the Irish language movement 2. Glúin na Bua
2.1 Constitution and rules
2.2 Membership
2.3 Minutes and report
2.4 Accounts
2.5 Publications and fliers
2.6 Correspondence
2.7 Other papers

3 Mac an Bheatha's involvement in the Irish language movement 3. "Inniu"
3.1 Accounts and business with printers
3.2 Copies of "Inniu"
3.3 Correspondence and memoranda
3.4 Press cuttings regarding "Inniu"

4 Mac an Bheatha's involvement in the Irish language movement 4. The Westport printing press FNT
4.1 Foundation and financial accounts
4.2 Correspondence

5 Mac an Bheatha's involvement in the Irish language movement Comhdháil Náisiúnta na Gaeilge

6 Correspondence

7 Proinsias Mac an Bheatha's work for the press
7.1 Drafts and proofs for press articles
7.2 Press cuttings and preparatory material/ drafts

8 Seosamh MacGrianna and "Scribhneoireacht Thír Chonaill": Mac an Bheatha's interest in the Ulster writers
8.1 Material pertaining to Seosamh MacGrianna
8.1.1 Assistance given to Seosamh MacGrianna
8.1.2 MacGrianna: collected works and criticism
8.2 Lectures, articles and essays by Mac an Bheatha on Mac Grianna and the Ulster writers

9 Book publications: preparation, drafts, reviews
9.1 "Tart na Córa" (published 1963)
9.1.1 Research material
9.1.2 Drafts
9.1.3 Post-publication documents
9.2 "Irish for the people"
9.3 "Téid focal le gaoith" (published 1967)
9.4 "An faoileán bán" (published 1975)
9.4.1 Drafts
9.4.2 Other documents regarding the novel
9.5 "Cnoc na hUamha" (published 1978)
9.6 "Roth an Mhuilinn" (published 1980)
9.7 "I dtreo na gréine" (published [1988])
9.7.1 Papers connected with the publication
9.7.2 "Inniu"
9.7.3 "George Gilmore"
9.7.3.1 Materials pertaining to the publication
9.7.3.2 Drafts
9.7.4 "Gluaiseacht ar strae"
9.7.5 "An fheadhain bheag mhór"
9.8 "Téann buille le cnámh" (published 1983)
9.9 "An Earnáil agus an Ghaeilge" (published 1985)
9.10 "Jemmy Hope - an chéad shóisialaí Eireannach" (published 1985)
9.10.1 Material in preparation for publication
9.10.2 Drafts
9.10.3 Reactions to "Jemmy Hope"
9.11 "Mé féin agus an gairdín" (published 1986)
9.11.1 Drafts, and material in preparation
9.11.2 Reviews
9.12 "Dóchas aduaidh" (published 1991)
9.12.1 Material collected in preparation
9.12.2 Drafts
9.13 "Henry Joy agus Véarsaí Eile" (published 1992)

10 Unpublished books, play
10.1 "Henry Joy McCracken"
10.2 "Jemmy Hope- the first Irish Socialist"
10.3 English version of "Dochas aduaidh"
10.4 "An Caisleán"

11 Collections of printed material
11.1 Press cuttings
11.2 Pamphlets
11.3 Book

12 Various other papers
12.1 Early notebooks, school work, agendas, other drafts
12.2 Collections of songs and poetry, own composition
12.3 Research notes, unidentified drafts
12.4 Other printed or draft material: programmes, brochures, essays et al.