| 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. |