Celtic Folklore - Welsh & Manx - By John Rhys (1901); e-text at the Internet Sacred Text Archive. - http://www.sacred-texts.com/neu/cfwm/
Pais Dinogad - Text and translation of one of the earliest surviving Welsh nursery rhymes. - http://users.comlab.ox.ac.uk/geraint.jones/about.welsh/pais-dinogad.html