 Urse was an assistant to William II 's main minister , Ranulf Flambard , and frequently served as a royal judge . The historian Emma Mason argues that Urse , along with Flambard , Robert Fitzhamon , Roger Bigod , Haimo the dapifer , or seneschal , and Eudo , another dapifer , were the first recognizable barons of the Exchequer . During his absence from England , the king addressed a number of writs to Urse , along with Haimo , Eudo , and Robert Bloet , ordering them to enforce William 's decisions in England . The historian Francis West , who studied the office of the justiciarship , asserts that Haimo , Eudo , and Urse , along with Flambard , could be considered the first English justiciars . 
