There is not much doubt that he was killed, somehow or other, by his nephew's orders. Among the most active nobles in these proceedings were the King's cousin, Henry Bolingbroke, whom the King had made Duke of Hereford to smooth down the old family quarrels, and some others: who had in the family- plotting times done just such acts themselves as they now condemned in the duke. They seem to have been a corrupt set of men; but such men were easily found about the court in such days.
The people murmured at all this, and were still very sore about the French marriage. The nobles saw how little the King cared for law, and how crafty he was, and began to be somewhat afraid for themselves. The King's life was a life of continued feasting and excess; his retinue, down to the meanest servants, were dressed in the most costly manner, and caroused at his tables, it is related, to the number of ten thousand persons every day. He himself, surrounded by a body of ten thousand archers, and enriched by a duty on wool which the Commons had granted him for life, saw no danger of ever being otherwise than powerful and absolute, and was as fierce and haughty as a King could be.
He had two of his old enemies left, in the persons of the Dukes of Hereford and Norfolk. Sparing these no more than the others, he tampered with the Duke of Hereford until he got him to declare before the Council that the Duke of Norfolk had lately held some treasonable talk with him, as he was riding near Brentford; and that he had told him, among other things, that he could not believe the King's oath - which nobody could, I should think. For this treachery he obtained a pardon, and the Duke of Norfolk was summoned to appear and defend himself. As he denied the charge and said his accuser was a liar and a traitor, both noblemen, according to the manner of those times, were held in custody, and the truth was ordered to be decided by wager of battle at Coventry. This wager of battle meant that whosoever won the combat was to be considered in the right; which nonsense meant in effect, that no strong man could ever be wrong. A great holiday was made; a great crowd assembled, with much parade and show; and the two combatants were about to rush at each other with their lances, when the King, sitting in a pavilion to see fair, threw down the truncheon he carried in his hand, and forbade the battle. The Duke of Hereford was to be banished for ten years, and the Duke of Norfolk was to be banished for life. So said the King. The Duke of Hereford went to France, and went no farther. The Duke of Norfolk made a pilgrimage to the Holy Land, and afterwards died at Venice of a broken heart.
Faster and fiercer, after this, the King went on in his career. The Duke of Lancaster, who was the father of the Duke of Hereford, died soon after the departure of his son; and, the King, although he had solemnly granted to that son leave to inherit his father's property, if it should come to him during his banishment, immediately seized it all, like a robber. The judges were so afraid of him, that they disgraced themselves by declaring this theft to be just and lawful. His avarice knew no bounds. He outlawed seventeen counties at once, on a frivolous pretence, merely to raise money by way of fines for misconduct. In short, he did as many dishonest things as he could; and cared so little for the discontent of his subjects - though even the spaniel favourites began to whisper to him that there was such a thing as discontent afloat - that he took that time, of all others, for leaving England and making an expedition against the Irish.
He was scarcely gone, leaving the DUKE OF YORK Regent in his absence, when his cousin, Henry of Hereford, came over from France to claim the rights of which he had been so monstrously deprived. He was immediately joined by the two great Earls of Northumberland and Westmoreland; and his uncle, the Regent, finding the King's cause unpopular, and the disinclination of the army to act against Henry, very strong, withdrew with the Royal forces towards Bristol. Henry, at the head of an army, came from Yorkshire (where he had landed) to London and followed him.