Here then we find Henry, who was now about half-way through his sixteenth year, appointed to the civil and military command of the most disturbed part of the King’s dominions. About six weeks later the men of Shropshire write to the Council complaining of the ravages of the Welsh rebels, and praying that some men-at-arms and archers should be sent to protect them till the Prince himself should come.

The King had now to meet a more formidable combination of enemies than he had yet encountered. Henry Percy, eldest son of the Earl of Northumberland, the Harry Hotspur of Shakespeare, had been a trusted lieutenant of Henry. He had served in Wales against Glendower, and had been employed both in negotiations with the Scotch and in military action against them. He conceived himself to have been unjustly treated, for reasons which do not concern our present purpose, and to avenge his wrongs he formed an alliance with Owen Glendower and with the Earl of Douglas on behalf of the King of Scotland. Glendower was to invade Gloucestershire. To meet this danger the King issued briefs, under date of June 16th, to the Lieutenants of Gloucestershire, Shropshire, Worcestershire, and Herefordshire, directing that all persons liable to serve should put themselves at the command of his son, Henry, Prince of Wales. At the same time an attack on the northern borders was threatened from Scotland, and the Percies, whose disaffection was not yet known at Court, were commissioned to repel it. The King himself marched northwards to assist them, and seems to have been ignorant as late as July 10th of their real intentions. These, however, became known to him a day or so after, for he issued briefs to the Lieutenants of the counties, dated from Burton-on-Trent on July 16th, Lichfield on the 17th, and Westminster on the 18th, requiring military assistance to repel the invasion of Henry Percy with the Welsh rebels and “certain enemies of ours from Scotland” in his company.

Six days later than the date of the Westminster brief the battle of Shrewsbury was fought. Prince Henry was on the field and bore himself bravely, though we must not credit him with the great achievement which Shakespeare attributes to him, of having slain Henry Percy in single combat. A lad, still wanting some months of sixteen, could hardly have vanquished a man of thirty, one of the bravest and most expert soldiers of his time. Hotspur seems to have been killed by a chance arrow as he was charging with characteristic impetuosity the royal forces. The young Prince was himself wounded in the forehead by an arrow.

His father’s confidence in him was continued. Two days after the battle he expresses his trust in the loyalty and prudent caution of his son, Henry, Prince of Wales, and gives him full power to amnesty at his discretion such persons concerned in the late rebellion as he might think fit, in the county of Chester and in other places named.

Owen Glendower, who had not shared the defeat of the Percies at Shrewsbury, still held out. In 1404 he assumed the title of Prince of Wales. In the June of that year the Sheriff of Hereford, with various gentlemen of the county, represented to the King that they were suffering greatly from the ravages of the Welsh rebels. The Prince was directed to go to their help, and on the 20th of the month wrote to his father from Worcester, to which city he had removed his headquarters. He thanks him for his kind letter written from Pontefract five days before, and rejoices in the news it brought of his health and prosperity, which are, he says, the greatest pleasure that can come to him in the world. He had been taking measures for the defence of the county of Hereford, which the Welsh rebels had been ravaging with fire and sword, and he would do all he could to resist them and to save England from their attacks. Another letter to the same effect was addressed by him to the Council, and a second four days afterwards.

On August 30th the Council granted him three thousand marks for the expenses of holding the castle of Denbigh and other strongholds in North Wales, and suggested that he should remain for a certain time on the borders of Herefordshire, and afterwards invade Wales. In a document apparently belonging to the same time there is a list of castles in North Wales which the Prince had kept at his own cost since the commencement of the rebellion.

In March 1405 the Prince wrote to the King relating a victory which he had won over the Welsh:

“On Wednesday, the 11th day of this present month of March, the rebels in parties from Glamorgan, Morganoe, Usk, Netherwart, and Overwart were assembled to the number of eleven thousand by their own account. On the said 11th of March they burnt part of your town of Grosmont. Thereupon I sent my dear cousin Lord Talbot and others. To them there joined themselves your faithful and valiant knights, William Newport and John Greindel. And though they were but a small number, yet was it well seen that the victory is not in the multitude of the people but in the power of God.... By the aid of the Blessed Trinity your people held the field of battle and vanquished the said rebels, and slew of them, by one account eight hundred, since said one thousand.... No prisoners were taken save one, a great knight, whom I would have sent to you but that he cannot yet comfortably ride.... I pray God to keep you always in joy and honour, and to grant me that I may soon comfort you with other good news.”

In this year by prompt action, and still more by skilful diplomacy, the King crushed a formidable insurrection that threatened his power in the north. After executing the chiefs of the rising—Scrope, Archbishop of York, and Mowbray, Earl Marshall—he turned his attention to Wales. If he could crush Glendower he had practically rid himself of his enemies, for he held in his power the heir to the Scottish throne. With his father’s action in the north the Prince could have had nothing to do; but we may be sure that he took a part in the Welsh campaign. Large as was the force which Henry brought into the field, little or nothing was accomplished. The Welshmen were driven from the plain country; but they could not be touched in their mountain fastnesses. Indeed the weather was so exceptionally bad that Glendower was believed to have secured the aid of this powerful ally by his magical arts. Early in the autumn the King returned to London, disbanding at the same time the greater part of his forces, and leaving the command of operations, as before, in the hands of the Prince of Wales.

It would be tedious to give all the details of Henry’s proceedings that may be found in the public documents of the time. On the whole, we get from these sources the picture of a vigorous young prince, who must of course have been assisted by older counsellors, but who was not a mere puppet in their hands. He is making head to the best of his abilities and means against a formidable rebellion. He is much hampered by want of money, and the King and the Council try to help him. As time goes on, more means and more power are put into his hands. King, Privy Council, and Parliament seem to be agreed in trusting him. The King does not think it necessary to visit in person the region which he had put into his son’s charge. More than once, after proclaiming his purpose to take the field himself against the Welsh rebels, he changes his mind, and goes elsewhere. The Council accept without hesitation his recommendation of the Prince and his affairs to their care. When Parliament is sitting, it votes him money for the purposes of his campaigns.