The squire Nigel was in fact Sir Nigel Baird, Baron of Bairdsbrae, the gentleman to whom poor King Robert II. had committed the charge of his young son James, when at fourteen he had been sent to France, nominally for education, but in reality to secure him from the fate of his brother Rothsay. Captured by English vessels on the way, the heir of Scotland had been too valuable a prize to be resigned by the politic Henry IV., who had lodged him at Windsor Castle, together with Edmund Mortimer, earl of March, and placed both under the nominal charge of the Prince of Wales, a youth of a few years older. Unjust as was the detention, it had been far from severe; the boys had as much liberty as their age and recreation required, and received the choicest training both in the arts of war and peace. They were bred up in close intercourse with the King's own four sons, and were united with them by the warmest sympathy. In fact, since usurpation had filled Henry of Lancaster's mind with distrust and jealousy, his eldest son had been in no such enviable position as to be beyond the capacity of fellow-feeling for the royal prisoner. Of a peculiarly frank, open, and affectionate nature, young Henry had so warmly loved the gentle and fascinating Richard II., that his trust in the father, of whom he had seen little in his boyhood, had received a severe shock through Richard's fate. Under the influence of a new, suspicious, and avaricious wife, the King kept his son as much at a distance as possible, chiefly on the Welsh marches, learning the art of war under Hotspur and Oldcastle; and when the father and son were brought together again, the bold, free bearing and extraordinary ability of the Prince filled the suspicious mind of the King with alarm and jealousy. To keep him down, give him no money, and let him gain no influence, was the narrow policy of the King; and Henry, chafing, dreaming, feeling the injustice, and pining for occupation, shared his complaints within James, and in many a day-dream restored him freely to his throne, and together redressed the wrongs of the world. Meantime, James studied deep in preparation, and recreated himself with poetry, inspired by the charms of Joan Beaufort, the lovely daughter of the King's legitimatized brother, the Earl of Somerset; while Henry persisted in a boy's passionate love to King Richard's maiden widow, Isabel of France. Entirely unrequited as his affection was, it had a beneficial effect. Next after his deep sense of religion, it kept his life pure and chivalrous. He was for ever faithful to his future wife, even when Isabel had been returned to France, and his romantic passion had fixed itself on her younger sister Catherine, whom he endowed in imagination with all he had seen or supposed in her.