You'll find another version of Níl sé 'na Lá at the unofficial Clannad site. The placename 'Creeslough' is spelled wrong in the notes, but the Irish looks okay at a quick glance. The words of the version I learned to sing are about the same, but to a much slower air than the one sung by Clannad. Published sources include Mícheál Ó hEidhin. 'Cas Amhrán'. Cló Cois Fharraige (available from Cló Iar-Chonnachta, Indreabhan, Co Galway) and Seán Óg Ó Baoill & Manus Ó Baoill. 'Ceolta Gael', Mercier Press, Cork. Also 'Abair Amhrán', but that book only has lyrics, no music.

My next installment: version from Róise na n-Amhrán, Róise Bean Mhic Grianna, of Arranmore Island, Co Donegal.