It focusses on the conspiratorial role played by John of Procida, cast as the villain.
[1][2] The contemporaneous Sicilian Rebellamentu di Sichilia portrays John as a hero.
The famous story of the provocation of the Vespers through the rape of a Sicilian woman by a French soldier is contained within the Rebellamentu and La vinuta di lu re Iapicu in Catania, the other Sicilian chronicle by Atanasiu di Iaci.
The Liber Jani has a similar story, but in it the woman turns a knife on the Frenchman and his comrades come to his aid.
[4] The Liber is preserved in a Vatican manuscript and is published by Lodovico Antonio Muratori in his Raccolta degli storici Italiani, XXXIV.43–78.