Miscellaneous documents, 1850-1916, including deeds, 1867 and 1877, relating to properties in the parish of Llanfaelrhys, co. Caernarvon, and copies (extracted 1916) of the wills of Henry Williams and William Parry, both of Ty Isaf in the parish of Rhiw, co. Caernarvon, proved 22 May 1850 and 5 March 1855 respectively.
The correspondence, [?1888]-1942, includes letters to John Griffith from H. Graham Dakyns (including one to his brother, J. R. Dakyns), 1910-1911, and Sir Walford Davies, [?1919]-1933; letters from John Griffith to J. Breese Davies, 1912-1930, and a related letter, 1942, from L. A. Breese Davies to Wyn Griffith.
Correspondence, papers and publications, 1949-1955, relating to the Civil Service, including memoranda on efficiency in the Civil Service and its relations with the public, and a specially bound copy of Wyn Griffith's A Hundred Years. The Board of Inland Revenue, 1849-1949 (London, 1949).
Manuscript and typescript copies, 1939-1940, of 'Branwen: a verse play for radio'; together with notes on Ernest Roberts, harpist of Bethesda, whom Wyn Griffith had visited with his father, November 1932.
An exercise book containing the original manuscript, 1932-1934, of the narrative poem, 'Branwen'; together with related drafts, 1931, including the 'Prologue to "The Death of Branwen"'; and the programme of a concert of verse, 27 July 1937, held at the Oxford Festival of Spoken Poetry, in which Wyn Griffith participated. The poem was published by J. M. Dent & Sons, [1934].
A letter, 1951, from Tecwyn Lloyd to Wyn Griffith, Chairman of the Welsh Committee of the Arts Council, enclosing a copy of his ideas for supporting and promoting the publication of Welsh books within the Arts Council; together with a related letter from Myra Owen of the Arts Council, and a copy of 'A memorandum on Arts Council policy in Wales drawn up by Huw Wheldon, Regional Director for Wales, 19th February 1947'.