It presents an investigation into the liturgical music of Sean and Peadar O Riada through an examination of three Roman-Rite mass settings composed in the Irish vernacular from within the cultural context of the West-Cork Gaeltacht of Muscrai. The main part of the work, running from Chapters Three to Six, consists of a detailed analysis of the contents of the mass settings, a body of material which is considered from the following perspectives: as...