I asked not for myself, particularly, but for others who may want to know more.  The Irish text I had found already, but Mick beat me to posting it.  It was recorded by the Chieftains as Rachamíd a Bhean Bheag, and by Séan Ó Ríada and Ceoltóirí Cualann as Raithineach a Bhean Bheag.

Malcolm