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?"