Rev. William Griffiths's journals, 1816-1855; printed diaries, 1837, 1843-1845, 1850-1851; a 'day book' or diary, 1854-1861, with additional entries at the end by his son; a notebook of autobiographical data upon which his book Gower memories of William Griffiths (Aberaeron, 1957) is based; personal letters, 1825-1849; miscellaneous letters, 1840-1860; printed copies of reports and notices of general meetings of the Glamorgan Banking Co., 1845-1858; sermon notes, 1817-1861; notebooks relating to subscriptions for Bethesda Church, Gower, 1838-1843; translation of Robert Jones, Drych yr Amseroedd; letters, 1851-1882, addressed mainly to William Griffiths [junior] at Aberaeron, and an account book, 1849-1855, relating to his business at Aberaeron; and correspondence of Miss A. G. Jones relating to the Rev. William Griffiths, 1948.