- I/2.
- Cyfres
Dangos 15 canlyniad
Disgrifiad archifol- II/1.
- Cyfres
- 1926-[c.1945].
- II/3.
- Cyfres
- 1931-1954.
Correspondence, reports and notes,
- III/3.
- Cyfres
- 1941-1954.
- V/2.
- Cyfres
- 1945-1954.
- V/4.
- Cyfres
- 1918-1947.
Celtic christianity and its developments,
- II/4.
- Cyfres
- [c.1952].
- V/1.
- Cyfres
- 1919-1923.
- II/2.
- Cyfres
- 1923-1949.
- III/2.
- Cyfres
Staffing, membership of Commission and salaries,
- I/3.
- Cyfres
- 1947-1954.
- I/4.
- Cyfres
- 1919-1954.
Folders containing typescript and manuscript copies and material.
- III/1.
- Cyfres
For further typescript copies of this work, see also NLW MSS 13706-13707.
- V/3.
- Cyfres
- 1934-1953.
All the letters in this section are addressed to Robert Richards unless otherwise stated.