The prologue, representing the effort of Lucifer and the spirits of the air to tear down the cathedral cross, is used without change. The part of Lucifer is assigned to the barytone voice, the spirits of the air to the sopranos and altos, and the bells to the tenors and basses, the whole closing with the Gregorian Chant. The orchestral accompaniment is very realistic, particularly in the storm music and in the final number, where the organ adds its voice to the imposing harmony. The first scene opens with the soliloquy of Prince Henry in his chamber ("I cannot sleep"), followed by a dramatic duet with Lucifer, describing the temptation, and closes with a second solo by the Prince, accompanied by a warning chorus of angels. The second scene opens before the cottage of Ursula at evening, with a short alto recitative ("Slowly, slowly up the Wall") with pastoral accompaniment, followed by a very effective choral hymn ("O Gladsome Light") sung by the villagers ere they depart for their homes, the Prince's voice joining in the Amen. The remainder of the scene includes a dialogue between Elsie and her mother, in which the maid expresses her determination to die for the Prince, and a beautiful prayer ("My Redeemer and my Lord") in which she pleads for strength to carry out her resolution, closing with her noble offer to the Prince, which he accepts, the angels responding Amen to the blessing he asks for her. The third scene opens with Elsie, the Prince, and their attendants on the road to Salerno where the cure is to be effected by her sacrifice. They fall in with a band of pilgrims, among whom is Lucifer in the disguise of a monk. The two bands part company, and as night comes on the Prince's attendants encamp near the sea. The continuity of the narrative is varied by a simple, graceful duet for the Prince and Elsie ("Sweet is the Air with budding Haws"); the Gregorian music of the pilgrims in the distance ("Cujus clavis lingua Petri"); the mocking characteristic song of Lucifer ("Here am I too in the pious Band"), interwoven with the chant; the song of greeting to the sea by the Prince ("It is the Sea"); and a very effective solo for Elsie ("The Night is calm and cloudless"), which is repeated by full chorus with soprano obligato dwelling upon the words "Christe Eleison." The fourth scene opens in the Medical School at Salerno, and discloses Lucifer disguised as the physician Friar Angelo, who receives Elsie and takes her into an inner apartment, notwithstanding the protests of the Prince, who suddenly resolves to save her, and finally effects her rescue. The music to this scene is very dramatic, and it also contains a short but striking unaccompanied chorus ("O Pure in Heart").