Papers relating to the life and career of Edward Morgan Humphreys, including letters to E. Morgan Humphreys, from several prominent Welsh figures, 1900x1955, relating to professional matters, such as his articles and contributions to newspapers, requests for articles, radio talks, addresses, literary works, public appointments, his involvement with the eisteddfod and various committees; together with some letters relating to personal affairs, politics and literary matters and letters written to him in his role as an editor; miscellaneous and family ('Dyffryn') correspondence, which are mostly letters of the families of E. Morgan Humphreys' great-grandfather, the Rev Richard Humphreys, and of his grandfather, the Rev Edward Morgan, [1800]x1953; articles, radio scripts and addresses by E. Morgan Humphreys, 1902x1955; together with some personal and family papers, 1841x1955; articles, poetry, adjudications and letters to the editor of Y Genedl etc., by T. Gwynn Jones, 1890x1949; and other miscellaneous papers accumulated by E. Morgan Humphreys, [1762]x1955. Some of the family correspondence was published in 'Some Nineteenth Century Letters', in The Transactions of the Honourable Society of Cymmrodorion, 1925-1926.

The group donated in 1987 comprises letters from Gareth Vaughan Jones to his family, 1922-1935, many while on foreign travels; letters to him, 1919-1934; a curriculum vitae and references, 1925-1934; research notes, [c. 1930]-1932; typescripts, drafts and notes for articles and lectures, [1925]-[1935]; typescripts of press articles written by Gareth Vaughan Jones during his world tour, 1934-1935; newspaper cuttings of Western Mail articles by Gareth Vaughan Jones, [1933]-[1935]; papers concerning Gareth Vaughan Jones's death, [1935]; printed books, 1926-1927, and papers of his father Dr Edgar Jones, including letters, 1890-1952; letters concerning the death of Gareth Vaughan Jones, 1935; press cuttings and papers relating to his time as head of Barry County School, 1906-1935; typescripts of broadcasts and talks, 1939-1945; and papers relating to his death, 1953. The papers deposited in 2007, 2010 and 2011 comprise family papers, 1894-2007, including a few papers relating to Gareth Vaughan Jones's parents Major Edgar Jones and Mrs Annie Gwen Jones; papers of, or relating to, Gareth Vaughan Jones, 1916-2002, including diaries, notebooks, press cuttings of his articles, letters, mainly from him to his parents and other members of his family, and papers relating to his capture and subsequent murder in August 1935; and the papers of Dr Siriol Colley, 1922-2004, mainly deriving from her researches into her uncle's life, work and death, including transcripts and photocopies of relevant source materials. The material donated in July 2011 comprises six pocket diaries containing detailed observations and comments on Gareth Jones's travels, mainly in Germany and Russia, between 1931 and 1934, together with the last passport issued to him in 1930, and a few stray items which have been incorporated in the previous files. Another group includes photographs, postcards, negatives and lantern slides, [c. 1900 - c. 1990].

Papers of Idris Aeron, 1931-1992, relating mainly to her equestrian and ornithological interests, including correspondence, 1948-1992; articles and letters to the press, 1931x1992; personal papers, 1941-1992, including some copies of biographical articles and autobiographical notes; diaries, 1954-1992; drawings and photographs, 1967x1981; and miscellaneous papers, 1967-1992, which include papers relating to the Society of Equestrian Artists, 1981-1992.