- Bala College I/183-200.
- Is-gyfres
- 1818-1844.
Dangos 1217 canlyniad
Disgrifiad archifolConstitutional Rules and a Confession of Faith,
- Bala College I/201-209.
- Is-gyfres
- 1819-1823.
- Bala College I/257-295.
- Is-gyfres
- 1835-1868.
Letters to Thomas Charles Edwards,
- Bala College I/311-324.
- Is-gyfres
- 1856-1915.
Sermons, addresses and diaries,
- Bala College I/340-588.
- Is-gyfres
- 1847-1922.
Letters to Richard Bennett (David Hamer - William Jones),
- David Hamer - William Jones
- Is-gyfres
- 1897-1932.
Letters to Richard Bennett (D. Morgan Lewis - Owen Prys),
- D. Morgan Lewis - Owen Prys
- Is-gyfres
- 1878-1926.
- Bala College I/109-128.
- Is-gyfres
- 1805-1841.
Letters to Owen Prys (1817-1886),
- Letters to Owen Prys (1817-1886)
- Is-gyfres
- 1844-1884.
Letters to Dr.Owen Prys (Anon - W. James),
- Anon - W. James
- Is-gyfres
- 1886-1934.
- Letters to John Hughes
- Is-gyfres
- 1808-1852.
Letters (Tom Beynon - David Griffiths),
- Tom Beynon - David Griffiths
- Is-gyfres
- 1904-1965.
Lectures, addresses, articles, etc,
- Lectures, addresses, articles (1873-1911)
- Is-gyfres
- 1873-1911.
Letters: Thomas Nicholas - M. Philipps,
- Thomas Nicholas - M. Philipps
- Is-gyfres
- 1849-1894.
Letters: T. Philipps - David Roberts,
- T. Philipps - David Roberts
- Is-gyfres
- 1852-1895.
Letters: T. Philipps- David Roberts,.
Letters: Edward Roberts - Robert Roberts,
- Edward Roberts - Robert Roberts
- Is-gyfres
- 1848-1893.
Letters: Samuel Roberts - Isaac Thomas,
- Samuel Roberts - Isaac Thomas
- Is-gyfres
- 1852-1894.
Canlyniadau 1201 i 1217 o 1217