- NLW MS 8250B
- Ffeil
- [1869] x [1899]
William Rowlands ['Gwilym Lleyn']: Llyfryddiaeth y Cymry ..., Llanidloes, 1869, with manuscript notes by David Lewis.
William Rowlands ['Gwilym Lleyn']: Llyfryddiaeth y Cymry ..., Llanidloes, 1869, with manuscript notes by David Lewis.