- NLW MS 1138B
- Ffeil
- 1910
'Cofiant, ynghyd a gweithiau barddonol, y deweddar Mr. [James] Watkin Davies (Watcyn Rhys y Gwaudd), Ystradfellte', written by 'Eryr' for the Pontneddfechan eisteddfod, 1910, with transcripts of additional poems and some letters relating to the poet.