High Quality Content by WIKIPEDIA articles! De Iniusta Vexacione Willelmi Episcopi Primi or Of the Unjust Persecution of the Bishop William I (sometimes translated as The Unjust Harassment of the First Bishop William) is a late 11th century historical work detailing the trial of William de St-Calais, a medieval Norman Bishop of Durham from 1081 to 1096. It is the first surviving detailed account of an English trial before the king, and as such is an important source for historians.