But whilst doubts may still be thought to hang over the exact time and the duration of Henry's academical pursuits, it is matter of (p. 029) historical certainty, that an event took place in the autumn of 1398, which turned the whole stream of his life into an entirely new channel, and led him by a very brief course to the inheritance of the throne of England. His father, hitherto known as the Earl of Derby, was created Duke of Hereford by King Richard II. Very shortly after his creation, he stated openly in parliament[31] that the Duke of Norfolk, whilst they were riding together between Brentford and London, had assured him of the King's intention to get rid of them both, and also of the Duke of Lancaster with other noblemen, of whose designs against his throne or person he was apprehensive. The Duke of Norfolk denied the charge, and a trial of battle was appointed to decide the merits of the question. The King, doubting probably the effect on himself of the issue of that wager of battle, postponed the day from time to time. At length he fixed finally upon the 16th of September, and summoned the two noblemen to redeem their pledges at Coventry. Very splendid preparations had been made for the struggle; and the whole kingdom shewed the most anxious interest in the result. On the day appointed, the Lord High Constable and the Lord High Marshal of England, with a very great company, and splendidly arrayed, first entered the lists. About the hour of prime the Duke of Hereford appeared at the barriers on a white courser, barbed with blue and (p. 030) green velvet, sumptuously embroidered with swans and antelopes[32] of goldsmith's work,[33] and armed at all points. The King himself soon after entered with great pomp, attended by the peers of the realm, and above ten thousand men in arms to prevent any tumult. The Duke of Norfolk then came on a steed "barbed with crimson velvet embroidered with mulberry-trees and lions of silver." At the proclamation of the herald, Hereford sprang upon his horse, and advanced six or seven paces to meet his adversary. The king upon this suddenly threw down his warder, and commanded the spears to be taken from the combatants, and that they should resume their chairs of state. He then ordered proclamation to be made that the Duke of Hereford had honourably[34] fulfilled his duty; and yet, without assigning any reason, he immediately sentenced him to be banished for ten years: at the same time he condemned the Duke of Norfolk to perpetual exile, adding also the confiscation of his property, except only one thousand pounds by the year. This act of tyranny towards Bolinbroke,[35] contrary, (p. 031) as the chroniclers say, to the known laws and customs of the realm, as well as to the principles of common justice, led by direct consequence to the subversion of Richard's throne, and probably to his premature death. [Footnote 31: Rot. Parl. 21 Rich. II. & Rot. Cart.]