[3.] Monumenta Germaniae Historica, Legum sectio, II, Capitularia Regum Francorum, I, Capitulare primum, 769; Capitulare Haristallense, 779; Admonitio generalis, 789; Synodus Franconofurtensis, 794; Epistola de litteris colendis, 780-800; Epistola generalis, 786-800; Capitulare missorum generale, 802; Capitularia missorum specialia, 802; Synodus et conventus aquisgrani habita, 802; Capitulare de examinandis ecclesiasticis, 802; Capitulare missorum, 803; Capitulare de causis etc., 811; Capitulare aquisgranense, 801-813; Capitulare cum episcopis etc., 780-790; Capitulare mantuanum primum, no date, p. 194; Pippini capitulare Italicum, 801-810.
[4.] MGH, Legum sectio, II, Capitularia Regum Francorum, I, Epistola generalis, no. 30, p. 80; P. Jaffé, Bibliotheca Rerum Germanicarum, vol. IV, Monumenta Carolina (Berlin, 1867) 139, 140.
[5.] Dom R. Van Doren, Étude sur l’influence musicale de l’abbaye de Saint-Gall (Louvain, 1925) ch. vi, Metz.
[6.] E. Mühlbacher, Deutsche Geschichte unter den Karolingern (Stuttgart, 1896) 211; Jaffé, Monumenta Carolina, 358ff.
[7.] E. Bishop, Liturgica Historica (Oxford, 1918) 49-55.
[8.] A. Fortescue, The Mass (London, 1914) 183.
[9.] In Monumenta Germaniae Historica—Poetarum latinorum medii aevi, vol. iv, edited by P. von Winterfeld (Berlin, 1923).
[10.] W. Turner, “Irish Teachers in the Carolingian Revival of Learning,” Cath. Un. Bulletin, XIII (Washington, 1907) 384-5; J. J. O’Kelly, Ireland: Elements of her Early Story (Dublin, 1921) ch. viii, Early Irish on the Continent.
[11.] Einhard, Vita Caroli, 21.
[12.] L. Gougaud, Gaelic Pioneers of Christianity, VI-XII Century (Dublin, 1923) 60-3. Translated by Victor Collins.