_HUGO_ _Viceroy of Sicily_.
_LIVIO_ _his son, lover of Margaret_.
_MANUEL_ _Chief Justiciary, betrothed to Constance_.
_PHILIP, Duke_ _Spanish commissioner_.
_FERDINAND_ _his secretary_.
_BLASCO_ _a Sicilian count_.
_MICHAEL ROSSO_ _a surgeon, lover of Margaret_.
_GIOVANNI PALICIO_ _brigand_.
_SQUARCIALUPU_ _his lieutenant_.
_MARGARET_ _sister to Manuel_.
_CONSTANCE_ _daughter to Hugo_.
_LUCIA_ _servant to Margaret_.
_Brigands, soldiers, messengers, servants._
_The scene is in PALERMO, and sometimes in the hills above MONREALE._
_Time, Spanish occupation of Sicily._