François-Marie Arouet wrote under the nom de plume of Voltaire, and produced works in almost every literary form, including plays, poems, novels, essays, and historical and scientific works. This tragedy is founded on historical truth. A duke of Brittany, in the year 1387, commanded the lord of Bavalan to assassinate the constable of Clisson: Bavalan, the day after, told the duke it was done: the duke becoming sensible of the horror of his crime, and apprehensive of the fatal consequences of it, abandoned himself to the most violent despair: Bavalan, after giving him time to repent, at length told him that he had loved him well enough to disobey his orders.