Sorry about pressing the wrong button just above. The singing by the Clancy Brothers of a song is no earnest of it being traditional.I know of only one singing by traditional singers of The Singing Bird and that is by the McPeake family. The Clancy Brothers almost certainly learned it from them. The author Katherine Tynan (also Hinkson) was living and published in 1894. Try DJ O'Donaghue: Poets of Ireland (1912) for more details. I don't have access to a copy presently.