- NLW MS 8416C.
- Ffeil
- 1840-1856.
Rhan oNeuadd Wen Manuscripts,
Minutes of proceedings and transactions of 'Cymdeithas Lenyddawl Meirion', 1840-1851, and 'Cymdeithas Gymroaidd y Bala', 1851-1856.
Rhan oNeuadd Wen Manuscripts,
Minutes of proceedings and transactions of 'Cymdeithas Lenyddawl Meirion', 1840-1851, and 'Cymdeithas Gymroaidd y Bala', 1851-1856.