The collection consists of personal, literary, and editorial correspondence, including correspondence from various poets and literary figures from Wales and other countries, and related papers, 1970-2017; literary contracts, agreements, and statements, 1971-2016; typescripts for published works, 1986-[c.1998]; papers relating to poetry readings, conferences, and events, 1995-2007; press cuttings and reviews, 1974-[c.2012]; papers relating to various music and poetry groups, 1999-2015; and diary notes, 1978-1985.

Literary, editorial and personal correspondence, draft and unpublished poetry, short stories and other works, and miscellaneous papers, 1955-1995; unpublished short stories and articles, articles and essays, reviews, lectures, plays, broadcasts, ghost-writing, miscellaneous prose, and editorials.

An additional consignment of papers, 2004-7, of Dannie Abse. This group remains uncatalogued.

A further tranch of papers, being letters, loose manuscripts, workbooks and miscellaneous papers, 2008-2013. This group remains uncatalogued.

Manuscripts, [late 12 cent.]-[early 20 cent.], formerly part of the library of the Mostyn family of Mostyn Hall, Flintshire, comprising transcripts and extracts from Giraldus Cambrensis, Geoffrey of Monmouth, Dares Phrygius, Nennius, Gildas, David Jenkins (Judge Jenkins), Sir John Wynn of Gwydir, Lydgate's 'Life of Our Lady', Leland's Itinerary, 'Chroniques de France', historical manuscripts such as Brut y Tywysiogion and Brut y Brenhinoedd, Welsh romances and the Mabinogion; collections of mainly Welsh poetry, among them the seventeenth-century volumes Llyfr Coch Nannau and Llyfr Gwyn Corsygedol, containing poems by Dafydd ap Gwilym, Guto'r Glyn, Tudur Aled, Siôn Cent and others; genealogies, pedigrees and histories; official papers relating to Caernarvonshire; catalogues of the Mostyn and Gloddaeth libraries, 1692-1842; etc.

Records relating to the Anglo-Welsh Review, mainly typescripts of material published in the magazine, 1957-1988, including editor's correspondence files, printer's copies and galley proofs, 1957-1988; and subscription lists, 1957-1975. The archive also includes correspondence and papers relating to the publication's demise and closure, 1981-2000 (November 2021 deposit).

Papers of Lucy Myfanwy Pryce, mainly relating to her writing, 1917-1967, including manuscripts and typescripts of unpublished novels, stories and a play, 1928-1962; with notebooks, 1909-1950; publishers' contracts, 1919-1946; press cuttings relating to her sister Marion Pryce, 1919-1929, and a scrapbook on folklore and ancient History, 1920-1932.

Four letters, 1919-1920, to Myfanwy Pryce from the novelist Stanley Weyman. They give advice about writing and publishing her novels.