- Bala College Safe papers
- Is-is-is-fonds
- 1542-1920.
Documents directly connected with Bala College, 1857-1920 (I), minutes and annual meetings of the Bala and District Branch of the British & Foreign Bible Society, 1835-1901 (II), documents relating to the Calvinistic Methodists of north Wales, 1809-1903 (III), and printed matter, 1542-1806 (IV-V).