[25.] P. A. Schubiger, _Die Sängerschule St. Gallens vom viii.-xii. Jahrhundert_ (Einsiedeln, 1858); W. Wilmanns, “Welche Sequenzen hat Notker verfasst?,” _Zeitschrift f. deutsches Altertum_, XV (1872) 267f.; J. Werner, _Notkers Sequenzen. Beiträge zur Geschichte der Lat. Sequenzendichtung_ (Aarau, 1901) III, IV; S. Singer, _supra_; Van Doren, (ch. 3, note 5) ch. 9; Clark, (ch. 3, note 14) 175. W. von den Steinen, _Notker der Dichter und seine geistliche Welt_, 2 vols. (Bern. 1948). This author reviews previous literature. [26.] Ottenwälder, _supra_, 464-5. [27.] They are _Canopica_, _Styx_, _Phlegethon_, _sophia_, _herous_, _Myrmidonas_, _spermologos_. [28.] P. S. Allen, _Romanesque Lyric_ (Un. of North Carolina Press, 1928) 66, 221, 222; Schnürer, _supra_, 89; Wellesz. _supra_, 165; W. B. Sedgwick, “Origin of Rhyme,” “_Revue Bénédictine_” XXXVI (1924), 341. [29.] Several attractive illustrations of the _modus_ may be found in Karl Breul’s edition of _The Cambridge Songs_ (Cambridge, 1915). [30.] Schnürer, _supra_, 89; R. Molitor, _Die Musik in der Reichnau_, reviewed in _Jahrbuch f. Liturgiewissenschaft_ VI (1926) 331. [31.] See Chapter VII. Chapter Five Late Middle Ages: Hymns and Sequences [1.] J. De Ghellinck, S. J., _L’Essor de la Littérature Latine au XIIe Siècle_, 2 vols. (Brussels, 1946) II, 285. [2.] M. Hélin, History of _Medieval Latin Literature_ (New York, 1949), translated by J. C. Snow from _Littérature d’occident: Histoire des Lettres latines du Moyen Age_, 79. [3.] L. Gautier, _Oeuvres poétiques d’Adam de Saint-Victor_, 2 vols. (Paris, 1858-9); E. Misset et P. Aubry, _Les Proses d’Adam de Saint-Victor_ (Paris, 1900). [4.] Translations of first lines: R. Messenger, Anon, E. Caswall. [5.] Translations of first lines: S. A. Hurlbut, R. Messenger. [6.] _A. H._ 48. 141-232. [7.] Translations of first lines: 1 and 2, H. Waddell; 3 and 5, E. Caswall; 4, R. Messenger. [8.] Hélin, _supra_, 117. [9.] P. Wagner, _Introduction to the Gregorian Melodies_ (ch. 4, note 3) 241. [10.] Translations of first lines: 1 and 4, R. A. Knox; 2, H. T. Henry; 3, W. J. Irons. [11.] Translation of first line: R. Messenger. [12.] R. E. Messenger, “Hymns and Sequences of the Sarum Use,” _TAPhA_, 59 (1928) 99-129. [13.] E. Bishop, _Liturgica Historica_ (Oxford, 1918) 211-37. [14.] E. Hoskins, _Horae Beatae Mariae Virginis etc_. (London, 1901); H. Bohatta, _Bibliographie des livres d’heures_ (Wien, 1924), 2nd edition. [15.] R. E. Messenger, “Hymns in the Horae Eboracenses,” _Classical Weekly_, 38 (Jan., 1945) 90-5.