Griffith Jones, Llanddowror, Ychwanegu i'r clipfwrdd NLW MS 13751B. Ffeil [20 gan., ¼ cyntaf] / Rhan oLlawysgrifau Philip Thomas, Castell-nedd, An address in Welsh by Philip Thomas on Griffith Jones, Llanddowror, Carmarthenshire. Philip Thomas.