[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.