Thomas de Mowbray, 4th Earl of Norfolk

He also received his father's title of Earl Marshal, but on a strictly honorary basis, the military rank being held by Ralph Neville, 1st Earl of Westmorland, as the Marshal of England.

He became involved with the latest rebellion of the Percies in the north, and raised an army with Richard le Scrope, Archbishop of York.

When Chief Justice Sir William Gascoigne refused to pass sentence upon them before they were tried by their peers, Henry IV had both Norfolk and Scrope summarily beheaded in York on 8 June 1405.

This conspiracy is the main historical context for Shakespeare's Henry IV, Part 2, and the execution is described with the words "Some guard these traitors to the block of death, / Treason's true bed and yielder up of breath."

His head was displayed for two months on a pike at Bootham Bar before it was taken down and reunited with the body.