her he should seize a magic branch from the tomb of Saint Rosalia in a nearby deserted cloister. Although to take it is sacrilege, the branch will give Robert magical powers. Robert declares that he will be bold and do as Bertram instructs. Bertram leads Robert to the cloister. The ghosts of nuns rise from their tombs, beckoned by Bertram, and dance, praising the pleasures of drinking, gambling and lust. Robert seizes the branch and fends off the demons who surround him. Act 4 A room in the palace Isabelle is preparing for her marriage with the Prince of Granada. Alice rushes in to inform her of what she has learnt about Robert, but she is interrupted by envoys of the Prince who enter bearing gifts. Robert arrives and, using the power of the branch, freezes everyone except himself and Isabelle. Unsettled by the power he's wielding, he confesses to Isabelle that he is using witchcraft, but begs her not to reject him. She expresses her love for him and implores him to repent (Robert, toi que j'aime). Robert breaks the branch and the spell it has created, and is taken into custody by Isabelle's attendants. Act 5 Outside Palermo Cathedral A group of monks extol the power of the Church. Bertram has freed Robert from the guards and the two arrive to prevent the marriage of Isabelle to the Prince of Granada. Bertram attempts to get Robert to sign a document in which he promises to serve Bertram for all eternity. He reveals to Robert that he is his true father and Robert decides to sign the oath from filial devotion. Before he can do so, Alice appears with the news that the Prince has been prevented from marrying Isabelle. Alice prays for divine help (Dieu puissant, ciel propice) and hands Robert his mother's will. Robert reads his mother's message, in which she warns him to beware the man who seduced and ruined her. Robert is wracked by indecision. Midnight strikes and the time for Bertram's coup is past. He is drawn down to hell. Robert is reunited with Isabelle in the cathedral, to great rejoicing. Costume designs for the first production The costumes were designed by François-Gabriel Lépaulle. Reception A number of factors influenced the opera's very favourable reception. The initial cast contained leading singers of the period and, as it changed, equally brilliant stars (e.g. Falcon) were