Thirteen notebooks, 1951-1973, containing journal entries; letters and postcards, many from relatives, literary agents and the media (relating in particular to her broadcasts on Welsh regional BBC programmes); photographs; ideas for fiction; and press cuttings of book reviews.

Manuscripts of Berta Ruck, [c. 1890]-[1974x1978], including notebooks, 1906-1946; manuscripts and typescripts of literary and autobiographical works, 1955-[1974x1978]; letters, [c. 1890]-1971; poetry, [1920s]-[1930s]; and sketches, [1900x1920].
The notebooks typically contain notes and ideas for fiction, drawings and sketches, pasted in letters and ephemera, and journal entries. These detail her home life and travels and give news of her sons Arthur and Bill Oliver, husband Oliver Onions and other family and friends.

Poetry and prose compiled at Brogyntyn for an album (cf. Brogyntyn MS I.29), but left unbound. The items, in various hands, are mainly in English but with a few in Latin, Welsh and French, and consist of political, satirical and occasional verse, both published and apparently unpublished (ff. 1-212 verso), together with a few letters (ff. 214-228), miscellaneous prose and commonplace entries (ff. 229-306), and printed material including song-sheets, pamphlets and newspaper cuttings (ff. 307-390). A number of items relate to Brogyntyn or Wynnstay or are addressed to family members.

Seventy-six letters, 1901-1917, from the poet Edward Thomas to his friend, the Rev. Jesse Berridge, containing personal and family news and references to the progress of his work (ff. 1-102; see The Letters of Edward Thomas to Jesse Berridge, ed. by Anthony Berridge (London, 1983); for letter no. 63 in the series see NLW MS 10617B).
Also included are transcripts of two letters from the poet to Mrs Edna Berridge, 1912 (ff. 103-104); one letter, [1940s], to Jesse Berridge from Helen Thomas, the poet's widow (f. 123), and two letters, 1957-1961, and a card, [?1950s], from Eleanor Farjeon (ff. 125, 127-128 verso), together with related papers, notably Berridge's draft of his short memoir of Edward Thomas, 1947 (ff. 106-111; see Letters, pp. 84-90), a typescript address, 1985, by R. George Thomas (ff. 131-134) and press cuttings, 1907-1978 (ff. 135-144), including articles by Helen Thomas, 1962-1963 (ff. 139-142). The collection also contains sketches by Edward Thomas, 1902 (f. 24 recto-verso), and references to W. H. Davies, 1905 (f. 52 recto-verso), Gordon Bottomley, 1907 (ff. 56, 58), Robert Frost, 1957 (f. 127), and to the First World War, 1915-1917 (ff. 92-102), together with a copy of a letter, 1947, to Rowland L. Watson, secretary of the Edward Thomas Memorial Committee (f. 105).

A typescript copy, [1962]-1979, of Saunders Lewis's Welsh play 'Excelsior', first published Swansea, 1980, with corrections in the author's hand (ff. 1-56); together with correspondence, 1980, in English and Welsh, of the publisher Christopher Davies, regarding its publication in view of the allegation, when broadcast in 1962, that it libelled the Rev. Llywelyn Williams, MP (ff. 57-81).
The typescript consists of pages from the original script, [1962], transmitted on BBC TV on St David's Day 1962 (ff. 5-16, 20-21, 42-51), interspersed with revised sections, [1979], for an abortive stage version (ff. 17-19, 22-41, 52-56), and the new Preface for the published volume, April 1980 (ff. 2-4). The correspondence consists of nineteen letters, April-October 1980, including copies and drafts, mostly between Saunders Lewis, Christopher Davies, Sir Alun Talfan Davies and Glyndwr Williams, brother of Llywelyn Williams. A cutting of Clive Betts' article, 'Saunders Lewis publishes play BBC abandoned' (Western Mail, 1 December 1980, p. 9), is on f. 82. The 1962 and 1980 versions of the play both appear in Dramâu Saunders Lewis: Y Casgliad Cyflawn, Cyfrol 2, ed. by Ioan M. Williams (Cardiff, 2000), pp. 273-414.

Cyfrol yn cynnwys torion, Rhagfyr 1918-Mehefin 1921, o 'Colofn Awen', colofn Cybi yn Yr Udgorn, papur newydd ardal Pwllheli (ff. 1-72 (rectos yn unig), 73-75, 76 recto-verso, tu mewn i'r clawr cefn). = A volume containing pasted-in cuttings, December 1918-June 1921, of 'Colofn Awen', Cybi's column in the Pwllheli newspaper, Yr Udgorn (ff. 1-72 (rectos only), 73-75, 76 recto-verso, inside back cover).
Defnyddiwyd y gyfrol yn wreiddiol fel llyfr ymarferion ysgol (Saesneg) gan Harry Hughes, Llangybi, 1911-1912. = The volume was originally used as a school exercise book (English) by Harry Hughes, Llangybi, 1911-1912.

Cyfrol yn cynnwys torion, Tachwedd 1916-Rhagfyr 1918, o 'Colofn Awen', colofn Cybi yn Yr Udgorn, papur newydd ardal Pwllheli (ff. i, 1-77 (rectos a 64 verso yn unig), tu mewn i'r clawr cefn). Defnyddiwyd y gyfrol yn wreiddiol gan Cybi, [c. 1906], i ysgrifennu barddoniaeth, sydd nawr, gan fwyaf, wedi ei orchuddio gan y torion. = A volume containing pasted-in cuttings, November 1916-December 1918, of 'Colofn Awen', Cybi's column in the Pwllheli newspaper, Yr Udgorn (ff. i, 1-77 (rectos and 64 verso only), inside back cover). The volume was was originally used by Cybi, [c. 1906], to write autograph poetry in Welsh, now mostly obscured by the cuttings.

The file comprises offprints, press and magazine articles published during Condry's lifetime, describing his early years, upbringing, education, professional career, literary activities, services to conservation and attitude to natural history.

The file consists of articles from American newspapers, covering all aspects of Thoreau's life and activities of the Thoreau Society, some of the more notable topics being the opening of a Thoreau Lyceum, Condry's address to the Society in July 1981, a reprint of a newspaper article which he wrote about Walden and Concord, August 1981, his meeting with Lillian Lund Files, the bluebird expert, the controversial contribution of Don Henley to the Walden Woods Project, the preservation of Thoreau's birthplace, and the death of Walter Harding, founder of the Society.

The file comprises newspaper and magazine cuttings on the subjects of wildlife persecution and the need for preservation, the impact of industrial developments on the environment, natural history and special sightings of particular birds, plants, reptiles, mammals and insects, agricultural methods, traditional crafts, land management and conservation issues.

The file comprises newspaper cuttings of 'A Country Diary' articles from The Guardian, 1957-1991, pasted onto index cards. The articles each have a descriptive title, which would seem to indicate that they were intended for the book A Welsh Country Diary, which was published in 1993.

The series includes scrapbooks, 1957-1984, loose newspaper cuttings, 1959-1998, typescript and manuscript drafts of the `Country Diary' articles published in The Guardian, 1957-1991, other, miscellaneous press cuttings, correspondence, notes and printed leaflets, 1988-1998. Condry's own titles for the files have been denoted by innverted commas.

The series comprises whole issues, individual pages, scrap books and loose cuttings of newspapers and magazines, 1816-1993, covering the biology of breeding, breed types, care, welfare, training, dog-loving celebrities, showing, clubs, animal photography, dogs and the law, working dogs, terriers, spaniels, anecdotes and a few, non-canine topics.

Papurau o eiddo J. Dyfnallt Owen neu a grynhowyd ganddo, 1863-1956, yn cynnwys pregethau; nodiadau bywgraffyddol ar weinidogion anghydffurfiol; llythyrau a phapurau eraill yn ymwneud ag achos yr Annibynwyr, 1863-1953; llythyrau amrywiol pellach, 1878-1956, rhai ohonynt yn cyfeirio at yr Orsedd yn Llydaw a Chernyw; dyddiaduron, 1897-1956; cyfraniadau ar gyfer eu cyhoeddi yn Y Tyst, etc., 1923-[1953]; sgriptiau radio, 1931-1955; pregethau, 1919; torion o'r wasg, [1872]-1954; dyddlyfrau taith, a nodiadau ar bynciau hanesyddol a llenyddol, 1901-1953. = Papers of and accumulated by J. Dyfnallt Owen, 1863-1956, including sermons; biographical notes on nonconformist ministers; letters and other papers concerning the Independent cause, 1863-1953; further miscellaneous letters, 1878-1956, some of which refer to the Gorsedd in Brittany and Cornwall; diaries, 1897-1956; contributions for publication in Y Tyst, etc., 1923-[1953]; radio scripts, 1931-1955; sermons, 1919; press cuttings, [1872]-1954; travel journals, and notes on historical and literary subjects, 1901-1953.

Miscellaneous papers in Welsh and English, 1822-[c.1950], mainly of Merthyr Tudful interest, accumulated by Elias Thomas, comprising poems and essays by his great-grandfather Rowland Thomas ('Idris Ddu'), his grandfather, William R. Thomas, and others, including an essay on the origin of the Cyfarthfa Ironworks by Rowland Thomas, with a translation of the same by Thomas Stephens (1821-75) of Merthyr; draft letters, articles and notes by Thomas Stephens; printed rules, 1846, of 'Cymdeithas Cadarn Graig y Cymry', Merthyr; and miscellaneous notes and press cuttings.

Cyfrol yn cynnwys torion, 1921, o golofn Cybi 'O Eifion i Arfon' yn Y Genedl Gymreig, yn ogystal ag ambell i ysgrif arall ganddo i'r wasg, 1918-1921 (ff. 1-27). = A volume containing pasted-in cuttings, 1921, of Cybi's column 'O Eifion i Arfon' in Y Genedl Gymreig, and a few other press contributions by him, 1918-1921 (ff. 1-27).
Defnyddiwyd y gyfrol yn wreiddiol fel llyfr ymarferion ysgol (Cymraeg a Saesneg) gan Harry Hughes, Llangybi, 1910-1911. = The volume was originally used as a school exercise book (Welsh and English) by Harry Hughes, Llangybi, 1910-1911.

Papurau yn ymwneud ag amrywiaeth eang o weithgareddau Brinli yn cynnwys llyfrau ysgol a defnyddiau addysgiadol eraill, 1915-1977; papurau cyfreithiol, yn bennaf gohebiaeth a nodiadau, 1918-1980; cofnodion Cyngor Dosbarth Trefol Maesteg, 1927-1976; papurau Undeb Annibynwyr Cymru, 1931-1976; hanes lleol, 1927-1971; Amgueddfa Genedlaethol Cymru, 1976-1981; deunydd yn ymwneud â'i gyfrolau ar Iolo Morganwg, [1974]-[1979]; Yr Eisteddfod Genedlaethol, 1926-1981, a beirniadaethau eisteddfodol, 1943-1981; torion papur newydd, 1920-1980; rhyddiaith Brinli, 1919-1978, a barddoniaeth, 1932-1981; gweithiau llenyddol eraill ganddo ef ac eraill, 1913-1978; gohebiaeth bersonol, 1909-1981; papurau eraill personol a theuluol, 1887-1981; ei ddyddiaduron, 1922-1981, a rhai ei dad, Joshua, 1893-1944; cofnodion Cylchdaith Annibynnwyr De Morgannwg, 1841-1978, Capel Siloh, 1850-1977, Eisteddfod Genedlaethol 1932 a 1948 ac eraill, 1932-1981; papurau Lewis Davies, Y Cymer (1863-1951), awdur nofelau i blant, [1849?]-1946, yn cynnwys sawl llyfr rent o Benderyn; papurau, 1883-1925, Rhys Dafydd Morgan (1851-1934), cyfieithydd o Gymro a fferyllydd ym Maesteg; papurau, 1882-1968, 'Wil Ifan' William Evans (1882-1968), archdderwydd, gweinidog yr Annibynwyr ac awdur; a phapurau, 1929-1979, 'Trefin, Edgar Phillips (1889-1962), bardd ac archdderwydd. = Papers concerning a wide variety of Brinli's activities including school books and other educational material, 1915-1977; legal papers, mainly correspondence and notes, 1918-1980; Maesteg Urban District Council records, 1927-1976; the Welsh Congregational Union papers, 1931-1976; local history, 1927-1971; the National Museum of Wales, 1976-1981; material relating to his books on Iolo Morganwg, [1974]-[1979]; the National Eisteddfod, 1926-1981, and eisteddfod adjudications, 1943-1981; newspaper cuttings, 1920-1980; Brinli's prose, 1919-1978, and poetry, 1932-1981; other literary works by him and others, 1913-1978; personal correspondence, 1909-1981; other personal and family papers, 1887-1981; his diaries, 1922-1981, and those of his father, Joshua, 1893-1944; records of the South Glamorgan Congregational Circuit, 1841-1978, Siloh Chapel, 1850-1977, and of the National Eisteddfodau of 1932 and 1948 and others, 1932-1981; papers of Lewis Davies, Y Cymer (1863-1951), author of children's novels, 1849-1946, including several rate books for Penderyn; papers, 1883-1925, of Rhys Dafydd Morgan (1851-1934), Welsh translator and Maesteg pharmacist; papers, 1882-1968, of 'Wil Ifan', William Evans (1882-1968), archdruid, congregational minister and author; and papers, 1929-1975, of 'Trefin', Edgar Phillips (1889-1962), poet and archdruid.

A collection of papers, 1945-[1950], accumulated by Dyfnallt in relation to the campaign on behalf of Breton nationalists, including papers, March-[?June] 1947, concerning the visit of a delegation from the National Eisteddfod Council, Dyfnallt among them, to Brittany and Paris in April 1947 (ff. 82-121), and including a copy of the first draft of the delegation's report (ff. 107-121).
Also included are manuscript and typescript drafts of various articles on the situation in Brittany (ff. 1, 4-5, 17, 23-30, 32-33, 35-44, 52-54), some in the hand of Paul Quentel (ff. 1, 4-5, 23-30); copies of 'Breton National News Service' newsletters for January and February 1947 (ff. 18-22); a copy of a draft statute for Brittany by the Parti National Breton, dated 10 February 1946 (ff. 8-14); typescript articles on Protestantism in Brittany (ff. 68-72) and the Irish harp (ff. 73-81); and newspaper cuttings, [June 1945]-[May 1947], mostly from various French language newspapers and Y Faner (ff. 122-142), including several articles by Dyfnallt (ff. 124-128, 130, 132, 135).

Llungopïau o dorion papur newydd, 1986-1989, ar wahanol bynciau megis yr enwadau crefyddol, cyfieithu'r Beibl i'r Gymraeg, llyfrgelloedd a llyfrgellyddiaeth yn gyffredinol a hanesion a digwyddiadau am yr Amgueddfa a'r Llyfrgell Genedlaethol; ac wedi eu rhwymo yn saith cyfrol.

Seven letters and two telegrams, 1939-1950, from the composer, actor and playwright, Ivor Novello, to Dorothy and Evelyn Wright, containing mainly personal news (ff. 1-13); together with additional personal papers, 1908-1955, compiled by the Wrights, including twelve letters to them from Lloyd Williams, Novello's secretary, [?1940]-[?1944] (ff. 5, 14-19 verso), actors Peter Graves, 1951-1955 (ff. 22-24 verso), Leslie Henson, 1942 (f. 25), and Barry Sinclair, 1943 (f. 26), and Neville Chamberlain, 1938 (ff. 20-21); also included are a memorial tribute to Ivor Novello, 1951 (ff. 27-28 verso), photographs of him and his associates, [1910s]-[1940s] (ff. 29-34), and press cuttings, 1939-1951 (ff. 39-46).
The collection contains references to theatrical productions at Johannesburg, 1947 (f. 8), the Pavilion Theatre, Bournemouth, [1940] (f. 14), the Palace Theatre, Manchester, [?1941] (f. 15), and the Adelphi Theatre, London, 1943 (f. 18).