- NLW MSS 12122-12124A.
- Ffeil
- 1895-1929 /
Thirteen pocket books containing notes by J. R. Williams, Rhosgadfan, co. Caernarvon, of sermons heard at Rhosgadfan [C. M. Chapel] and elsewhere during the period 1895-1929 (with gaps). NLW MS 12123A contains minutes, memoranda, and accounts of Rhosgadfan C. M. Sunday School, 1905-1906.
Williams, J. R., Rhosgadfan