I think there are other threads about Seán Ó Duibhir a' Ghleanna, Seán O'Dwyer of the Glen. I refreshed this thread because I've just been looking at a folk song journal index provided on-line by Bruce Olson and I spotted the following reference:Éshtig liúm-sa shealad| Shean Ó Dyr A Ghleana [John O'Dwyer of the Glen. by Warren of Kilkenny, c 1814]; JFSS 25, p. 282, 1921