 After the death of King William I of England , Urse continued to serve William 's sons and successors , Kings William II Rufus and Henry I. While William I granted the duchy of Normandy to his eldest son , Robert Curthose , England went to his second surviving son , William Rufus . Henry ( later Henry I ) , the youngest son , was given a sum of money . In 1088 , shortly after William Rufus became king , Urse was present at the trial of William de St @-@ Calais , Bishop of Durham , and is mentioned in De Iniusta Vexacione Willelmi Episcopi Primi , a contemporary account of the trial . During William I 's reign , Urse had served the king mainly as a regional official , but during William II 's reign Urse began to take a broader role in the kingdom as a whole . Urse became a constable in the king 's household for both William II and Henry I , and under William II , he ascended to the office of marshal . 
