Earl Marshal of the College of Arms, the body concerned with all matters of genealogy and heraldry. In conjunction with the Lord High Constable, he had held a court, known as the Court of Chivalry, for the administration of justice in accordance with the law of arms, which was concerned with many subjects relating to military matters, such as ransom, booty and soldiers' wages, and including the misuse of armorial bearings. In 1672, the office of Marshal of England and the title of Earl Marshal of England were made hereditary in the Howard family. In a declaration made on 16 June 1673
William Marshal, 1st Earl of Pembroke brother John Marshal (who was serving as seneschal) was killed while defending Marlborough for the king's brother John. Richard allowed Marshal to succeed his brother in the hereditary marshalship, and his paternal honour of Hamstead Marshall. The Marshal served the king in his wars in Normandy against Philip II. On Richard's death-bed the king designated Marshal as custodian of Rouen and of the royal treasure during the interregnum. William supported King John when he became king in 1199, arguing against those who maintained the claims of Arthur of Brittany, the teenage son of John's elder brother Geoffrey. William was heavily