‘Shamrock, Rose and Thistle’ is an appropriate metaphor for the mixed Irish, English and Scottish strands that make up the English-language song tradition of the north of Ireland, and it is also the title of an important collection-study made of this tradition by Hugh Shields: the book Shamrock, Rose and Thistle: Folk Singing in North Derry, which was first published in Belfast in 1981 and is long out of print.