- Plas Gwyn Papers (1924) 1-151.
- Is-fonds
- 1315-1841.
Rhan oPlas Gwyn Estate Records
Arranged by record type into legal and other papers, many relating to the diocese of Bangor, 1315-[c.1800]; papers relating to tithes, taxes, etc., in the diocese of Bangor, including the parishes of Gyffin and Aber, co. Caern., 1609-1690; letters, 1619-1780, many to John Jones, Dean of Bangor; undated letters, [1689x1743], many to John Jones, Dean of Bangor; poetry, mostly undated; and printed matter, 1654-1841.