- NLW MS 18403D.
- Ffeil
- 1895-1896.
Correspondence, mainly letters addressed to H. Humphries, Rhiwbach Slate Quarry, Blaenau Ffestiniog, together with copies of letters from Humphries. (Formerly Borth-y-gest MS 142.) English. Boards. Purchased from the library of Mr R. E. Jones, Borth-y-gest, 1959-1961.