 Complete the following phrase:  Humphrey VI de Bohun c. 1249  31 December 1298, 3rd Earl of Hereford and 2nd Earl of Essex, was an English nobleman known primarily for his opposition to King Edward I over the Confirmatio Cartarum. He was also an active participant in the Welsh Wars and maintained for several years a private feud with the earl of Gloucester. His father, Humphrey V de Bohun, fought on the side of the rebellious barons in the 