A collection of 808 items which includes, a Gwredog account book, 1784-1804; account and commonplace books of Samuel Judd, joiner and undertaker of Amlwch, 1837-1849; eleven account books (1827-1867) and nineteen diaries (1825-1868) of William Jones of Brynymor, Penmaenmawr; records of Gwredog, comprising farm and account books (1842-1922) and diaries (1857 and 1871-1922) of William Jones's son Elias Jones (d.1892), his grandson Owen Lloyd Jones (d.1898) and grand-daughter Mary Jane Jones.
The additional group of 464 items deposited in 1959 comprises of family correspondence and miscellaneous papers covering the period 1829-1924.
The further additional group of 233 papers deposited in 1967 comprise of letters to and from various members of the family, 1807-1910; miscellaneous letters, 1829-1913; letter books, 1861-1923; rentals, etc., 1862-1921; diaries and journals, 1870-1924; accounts, 1818-1930; deeds, wills and other legal documents, 1786-c.1939; and miscellaneous papers, 1822-ca.1915.