Llyfr Bedyddiadau 1808 - 1940, Llyfr eisteddleoedd/pew rent book, 1887 - [1930]; llyfr casgliad y weinidogaeth/collection for the ministry, 1910 - 1924; cyfraniadau/contributions, 1921 - 1925; llyfr yr ysgrifennydd/secretary`s book, 1931 - 1935; adroddiadau blynyddol/annual reports, 1991 - 2006; correspondence relating to lease of chapel ground, 1876 - 1886; papers relating to the maintenance of the fabric of the chapel, 1876 - 1884; plans for rebuilding and alterations, 1887 - 1888; plans from sale of the Ucheldre Estate, 1906; gohebiaeth amrywiol/miscellaneous correspondence, [1879 - 1909]; lluniau a printiau, 1861 - 1924; Ffeil: Hanes Capeli Presbyteraidd Caergybi,
1858 - 2004.