Epiphaniam Domino canamus gloriosam. [Epiphany.] This Sequence occurs in a manuscript of Sequences (circa 1000) in the Bodleian Library, Oxford, No. 775, f. 140. It is also in a Winchester manuscript of the 11th century, now at Corpus Christi College, Cambridge, and an 11th century manuscript in the British Museum (Harl. 2961, f. 251 b). In the Sarum Missal it is the Sequence for the Feast of the Epiphany only. In the Hereford Missal it is appointed for the Epiphany itself, its Octave, and the Sunday in the Octave. In the York Missal it is divided into three parts: (1) "Epiphaniam Domini," (2) "Balaam de quo vaticinans," and (3) "Magi sibi stelia." The first is to be said on the Feast of the Epiphany, the second on the first day after; the third on the second day after, and so on, to the Octave, when the entire Sequence has to be sung. If however the 2nd or 3rd part should fall upon a Sunday, then it gave place to the proper Sequence for the "Translation of St. William the Archbishop," the Festival of that day. Text in reprints of the Sarum, Hereford, and York Missals, and Kehrein, No. 27. [Rev.W. A. Shoults, B. D.]
Translations in common use:—
1. Sing we in triumphal gladness. By R. F. Littledale, written for and first published in the People's Hymnal, 1867, No. 45, and signed "A. L. P." It is in 7 stanzas of 6 lines.
--Excerpts from John Julian, Dictionary of Hymnology (1907)