Oswald Forster had not been present when, in June, 1400, the king arrived at Alnwick. A few days after the coming of the Earl of March, Hotspur received a letter from Sir Edmund Mortimer, the brother of his wife; asking him to send a body of men-at-arms, under an experienced captain who could aid him to drill newly-raised levies; for that one Owen Glendower had taken up arms against the Lord Grey de Ruthyn, and that turbulent men were flocking to his standard, and it was feared that serious trouble might ensue. Percy was in a position to send but few men, for with war with the Scotch imminent, he could not weaken himself by sending off a large force. However, he sent for Alwyn Forster.  
"I need twenty picked men, for the service of Sir Edmund Mortimer, Alwyn. I would send more, were it not for the position of affairs here. What say you to taking the command of them?"
 
"I would gladly do so, my lord, if it be that there is a chance of something more lively than drilling hinds, and turning them into men-at-arms, which has been my business for years now, without a chance of striking a blow in earnest."
 
"I think that there will be a certainty of fighting, Alwyn. The Welshmen are growing troublesome again, and Sir Edmund thinks that there may be tough work, on the Welsh marches, and has written to me for aid.
 
"With the king coming hither, there is a chance that the Earl of March, and myself, will open the war by harrying the Douglas's lands. I can spare no great force, but even twenty tried men-at-arms would, no doubt, be welcome. As the king is going to march into Scotland, there is no fear that there will be any serious invasion by the Scots, and therefore you can be spared for a while. I think not that any of my knights would care to go in command of so small an array, but I thought that you might like to take it."
 
"I shall be right glad to do so, my lord."
 
"I shall send your nephew with you. He is a shrewd and gallant young fellow, and I know he would far rather be taking part in active service, against the Welsh, than spending his time in idleness, here. He has been too long used to a life on horseback to rest contented to be cooped up in a castle. Besides, there will be a good opportunity of distinguishing himself, and of learning something of a warfare even wilder, and more savage, than that in these northern marches."
 
"I should like much to have him with me, my lord. Methinks that he has the making of a right good knight; and, young as he is, I am sure that his head is better than mine, and I should not be too proud to take counsel of him, if needs be."
 
"That is settled then, Alwyn. Choose your men, and set off tomorrow morning. Ralph Peyton, your lieutenant, shall take the command of the garrison until you return."
 
Oswald was delighted when his uncle told him of the mission with which he was charged, and that he himself was to accompany him.
 
"You are to have the choice of the men-at-arms, Uncle?"
 
"Yes, Oswald. I know what you are going to say. You would like to have that mad monk of yours, as one of them."
 
"That should I, Uncle. You have no stouter man-at-arms in all your band, and he has proved that he can be discreet when he chooses, and did me good service in my last expedition."
 
"Very well, lad, we will take him. I will send one of the men over, at once, for him to join us on the road tomorrow. I shall choose young and active fellows, of whom we have plenty. I have never fought against the Welsh; but they are light footed, and agile, and their country is full of hills and swamps. The older men would do as good service here, were the castle besieged in our absence; of which, however, there is but slight chance; but for work against the Welsh, they would be of little use."
 
Hotspur himself spoke to Oswald, that evening.
 
"Here is a missive to give to Sir Edmund Mortimer. I have commended you to him, telling him that, though young, there is not one of my squires in whom I could more implicitly trust; and that you had carried out a delicate mission for me, with rare discretion and courage. Your uncle, as an old retainer, and a good fighter, and the captain of my garrison, goes in command of the men-at-arms, and in regular fighting one could need no better officer; but in such warfare as that against the Welsh is like to be, yours will be the better head to plan, and as my squire you will represent me. I have specially commended you to him, as one always to be depended upon."
 
"I am greatly beholden to your lordship," Oswald said, "and will try to justify the commendations that you have given me."
 
At daybreak on the following morning, the little party rode out from the castle. Oswald with his uncle rode in front; the former in the highest spirits, while the sturdy old soldier was himself scarce less pleased, at this change from the monotony of life in garrison.
 
"Years seem to have fallen off my shoulders, lad," he said, "and I feel as young as I did when I fought at Otterburn."
 
"That was a bad business, Uncle; and I trust that no such misfortune as that will befall us, this time."
 
"I hope not, indeed, Oswald. It was a sore fight, and we are scarce likely to have a pitched battle with these Welsh carls. They fight not much in our fashion, as I have heard; but dash down from their hills, and carry fire and sword through a district, and are off again before a force can be gathered to strike a blow. Then there are marches to and fro among their hills, but it is like chasing a will-o'-the-wisp; and like enough, just when you think you have got them cooped up, and prepare to strike a heavy blow, they are a hundred miles away, plundering and ravaging on our side of the frontier. They are half-wild men, short in stature, and no match for us when it comes to hand-to-hand fighting; but broad in the shoulder, tireless, and active as our shaggy ponies, and well-nigh as untamable. 'Tis fighting in which there is little glory, and many hard knocks to be obtained; but it is a good school for war. It teaches a man to be ever watchful and on his guard, prepared to meet sudden attacks, patient under difficulties; and, what is harder, to be able to go without eating or drinking for a long time, for they say that you might as well expect to find corn and ale on the crest of the Grampians, as you would on the Welsh hills."
 
"The prospect doesn't look very pleasant, Uncle," Oswald laughed. "However, their hills can scarcely be more barren than ours, nor can they be quicker on the stroke than the border raiders; and for such work, we of the northern marches have proved far more useful than the beefy men of the south."
 
"No doubt, no doubt; and maybe that, for that reason, Sir Edmund prayed Hotspur to send a detachment to his aid; for he would know that we are accustomed to a country as rough, and to a foe as active as he has now to meet.
 
"I wonder what has stirred up the Welsh now, knowing as they do that, although they may gain successes at first, it always ends in the harrying of their lands, and the burning of their castles and villages. They have been quiet for some years. But they are always like a swarm of bees. They will work, quietly enough, till they take offence at something; then they will pour out in a fury, attacking all they come across, and caring nothing about death, so that they can but prick an enemy with their stings. Maybe it is the report that the king is engaging in another Scotch war, and they think that it is a good time to gather spoil from their neighbours. They used to be mightily given to warring among themselves, but of late I have heard but little of this.
 
"It is a hundred years, now, since they were really troublesome, and rose under Morgan ap Madoc; and Edward the Second had himself to reduce them to submission, and build strong castles at Conway, Beaumaris, and other places. There have been one or two partial risings, since then, but nothing of much consequence. It may well be that the present generation, who have not themselves felt the power of English arms, may have decided to make another stroke for independence; and if so, it will need more than Mortimer's force, or that of the other border barons, to bring them to reason; and as for our little detachment, it will be but a drop in the ocean. However, it may be that this is a mere quarrel, between Mortimer and some of his neighbours.
 
"I have heard somewhat of the Welshman Owen Glendower, who lives in those parts. He has a grievance against Lord Grey of Ruthyn; who, as he says, unjustly seized a small estate of his. I know that he petitioned Parliament for redress, but that his petition was lately refused."
 
"'Tis strange that such a man should have known enough of English law to have made a petition to our parliament."
 
"Yes; but he is no common man. He went to England and studied at our universities, and even lived in the inns of court, and learned the laws of this country. Then, strangely enough, he became an esquire in the household of King Richard, and did good service to him; and when the court was broken up, on Richard being dethroned, he went away to his estate in Wales. Since then I have not heard of him, save as to this dispute with Lord Grey and his petition to Parliament thereon; but men who were at Richard's court have told me that he was a courteous gentleman, of excellent parts and, it was said, of much learning."
 
"Such a man might be a formidable enemy," Oswald said; "and if he has been robbed by Lord Grey, he might well head an insurrection, to recover his estates from that noble."
 
In the course of their ride they were joined by Roger, who warmly thanked Alwyn for having selected him as one of his band. The other soldiers received him heartily, for the fighting monk had been a familiar personage at Alnwick, and his mighty strength and jovial disposition rendered him very popular among the soldiers of the garrison. There had been general satisfaction among them, when it was known that he had laid aside his monk's gown, and had become one of the Percys' men-at-arms; and there had been many expressions of regret that he had been sent off, instead of forming one of the garrison of Alnwick. Two or three of them addressed him, as usual, as monk, but he said:
 
"Look here, comrades, I have been a monk, and a bad one, and the less said about it the better. I am no longer a monk, but a man-at-arms; and as I am not proud of my doings as a monk, I have given up the title, as I have given up the garb. Therefore I give fair notice that whosoever, in future, shall address me as monk, will feel the weight of my arm. My name is Roger, and as Roger let me be called, henceforth."
 
So saying, he fell into his place in the line, when the cavalcade continued their way.
 
The journey was a long one. Oswald had been well supplied with funds, and seldom found difficulty in obtaining lodgings for the party. The sight of an esquire, with a small troop of men-at-arms wearing the Percy cognizance, excited no curiosity as they rode south; but when they turned westward it was otherwise, and at their halting places Oswald and his uncle, who dined apart from the others, were always questioned as to their destination.
 
But when it was known that they were travelling to the castle of Mortimer, whose sister was the wife of their lord, none were surprised; for rumours were already current of troubles on the Welsh border; and when they entered Shropshire they heard that Owen Glendower, with a considerable force, had fallen suddenly upon the retainers of Lord Grey de Ruthyn, had killed many, and had reoccupied the estates of which he had been deprived by that nobleman.
 
On the fifteenth day after leaving Alnwick they arrived at Ludlow Castle, of which Mortimer was the lord. Oswald was at once conducted to the hall where the knight was sitting.
 
"I am bearer of a message from Sir Henry Percy," he said; "he has sent hither a party of twenty men-at-arms, under the command of the captain of his garrison, at Alnwick."
 
"I had hoped for more," the knight said, taking the missive and opening it; "but I can understand that, now the king is marching against Scotland, Percy cannot spare troops to despatch so long a distance. I trust that he and my sister, his wife, and the earl are in good health?"
 
"I left them so, sir."
 
The knight read Hotspur's letter.
 
"He speaks in terms of high commendation of you, young sir," he said, as he laid the letter down on the table. "Such commendation is rarely bestowed on one so young. I marvelled somewhat, when you entered, that Sir Henry Percy should have sent so young a squire; but from what he says, I doubt not that his choice is a good one; and indeed, it is plain that your muscles have had rare exercise, and that you can stand fatigue and hardship better than many older men. It is like that you will have your share, for the whole border seems to be unsettled. You have heard that this Glendower has boldly attacked, and driven out, Lord Grey's retainers from the estates he had taken.
 
"As to the rights of that matter, I have nought to say. Lord Grey manages the affairs with the Welsh in his own county of Denbighshire, and along the north; and I keep their eastern border, and I meddle not with his affairs, nor he with mine. I know that this Glendower is a supporter of King Richard, of whom there are many tales current; some saying that he escaped from Pomfret, and is still alive, though I doubt not that the report that he died there is true. We know that there is, in Scotland, a man whom it pleases Albany to put forward as Richard; but this, methinks, is but a device to trouble our king. Whether this Glendower believes in this man, or not, I know not; but certain it is that he would embrace any opportunity to prove his hostility to Henry, whom he professes to regard as a usurper. Whether it is on account of his holding such opinions, and foolishly giving expression to them, that Lord Grey thought fit to seize his estates I know not; nor, indeed, do I care. Now, however, that the man has taken up arms, and by force has dispossessed Lord Grey, the matter touches all of u............