The letters, 1899-1925, refer to contemporary events in Wales, notably within Caernarfonshire, many to political developments and literary themes. There are many references to prominent Welsh figures, their activities and contribution, especially O. M. Edwards.

The papers comprise correspondence files, 1918-1982, among them general and political letters to Goronwy Roberts and constituency correspondence; subject files, 1913-1981, including papers concerning foreign affairs (some deriving from Goronwy Roberts's trips abroad), domestic politics, Welsh politics and matters relating to Wales, and files of material concerning Caernarfonshire; various personalia, 1918-1982; and miscellaneous papers, 1900-1997, including printed items and press cuttings.

Miscellaneous papers comprising holograph notes of an address by D. R. Daniel on 'Yr Ysgol Sul ar Oes', delivered at Pwllheli, 13 May, [18]95; holograph notes by D. R. Daniel of a Caernarvon Boroughs election address; a pocket-book containing diary entries, accounts, etc., of P. Ll. Daniel, Fourcrosses, 1903; 'englynion' by William Henry Roberts ('Iseifion'), Fourcrosses, entitled 'Llinellau Byrfyfyr a wnaed ... ddiwrnod cyn pleidleisio am aelod i'r Cyngor Sir dros y plwyfi Llanarmon a Llanystumdwy &c. 1910' and 'Er Cof anwyl Am y ddiweddar Miss Blodwen Ellen Jones, Talafon, Chwilog'; and press cuttings.

Includes material on the annual meeting of the Labour Party Wales held at Llandudno on 27-28 May 1977 and a copy of a memorandum, dated 26 May 1977, entitled 'Developments in Caernarvonshire since March 1974'.

Papers of William George, Criccieth, consisting of his personal and family correspondence, diaries and notes, 1881-1960, and papers relating to his publications and public life (including political, legal, religious and Welsh cultural material), 1883-1958, together with diaries, 1881-1915, of Richard Lloyd ('Uncle Lloyd'), and a considerable amount of correspondence and other papers relating to members of the George family, the Lloyd family and the Lloyd George family, 1766-1981. Of particular interest is a very substantial group of papers of David Lloyd George, including: correspondence with William George, mostly 1886-1918; diaries, 1878-1892; letters from prominent politicians, 1879-1913; other letters, including many to family members, 1883-1928; letters from his secretaries, 1906-1963; and working drafts and notes in preparation for his speeches.