MacNeill, Eoin, Article, Ogam Inscriptions, in Transactions of the Royal Irish Academy, July, 1909.
MacNeill, Eoin, Where does Irish History Begin? and other Articles, in New Ireland Review, Mar.–Dec., 1906.
MacNeill, Eoin, An Irish Historical Tract, dated 721 A.D., in Transactions of the Royal Irish Academy, xxviii, Dublin, 1910.
Manitius, Max, Geschichte der Lateinischen Literatur des Mittelalters, teil i, München, 1911.
Matthew, J. E., The Literature of Music, London, 1896.
McCormick, P. J. (Rev.), Education of the Laity in the Early Middle Ages, Washington, D.C., 1912.
McKenna, Jas. E. (Right Rev., D.D.), Irish Art, C.T.S. Publication, Dublin, 1910.
Meyer, Kuno, Learning in Ireland in the Fifth Century, Dublin, 1913.
Meyer, Kuno, Ancient Irish Poetry, London, 1911.
Meyer, Kuno, Tocosca Cormaic, Todd Lecture Series, Dublin, 1909.