A conspiracy against Henry IV. came to a head at Windsor, when the Duke of Exeter seized and searched the castle. Henry, however, had had timely warning, and had fled. "He rode to London and made him strong to ride on his enemies," and crushed the rebellion. The Castle during this reign held two unfortunate young prisoners, the Earl of March, whose only fault was his descent from an elder son of Edward III., Henry himself being descended from a younger branch; the other was one of the most unfortunate of the hapless house of Stuart, James Stuart. The king, his father, had sent him to France to complete his education. Henry, however, fearful of an alliance between France and Scotland, seized the Prince's vessel, and sent James to Windsor, declaring jocularly that England possessed good French teachers. Henry kept his word, and the young prince received a good education. He seems in every respect to have been treated as suited his rank, and was allowed plenty of freedom, sharing in all the festivities of the court. From his tower window he beheld and fell in love with the fair Joanna Beaufort, the king's niece, whom he eventually married. His return to Scotland marked the beginning of a sad and gloomy reign, and he was assassinated by his unruly nobles in 1437, to whom he had made himself odious by trying to curb their power. In 1416, the Emperor Sigismund was present at the feast of St. George, bringing as an offering the heart of St. George, which remained in the chapel till the Reformation. Whilst Henry V. was besieging Meaux he heard of the birth of his son. "But when he heard reported the places of his nativity, were it that he, warned by some prophesie, or had some fore-knowledge, or else judged himself of his son's fortune, he said unto the Lord Fitz Hugh, his trusty chamberlain, these words, 'My lord, I, Henry, born at Monmouth, shall small time reign and much get, and Henry, born at Windsor, shall long reign and all lose; but as God will, so be it.'" Although this unfortunate Henry of Windsor spent all his early years at his birthplace, the Castle fell into a very neglected condition. On his marriage with Margaret of Anjou, some necessary repairs were made for her reception, and during his illness, in 1453, Henry lived here. Edward IV. was the first monarch interred at Windsor, where his little daughter Mary and his son George of Clarence, supposed to have been drowned in a cask of wine, had been buried before him. In 1484, the remains of Henry VI. were removed from Chertsey Abbey, and interred beside those of his rival. In 1789 some workmen came across the lead coffin of Edward IV. On opening it the entire skeleton was found, measuring 6 feet 3-1/2 inches in length. A lock of brown hair taken from the coffin is in the Ashmolean Museum at Oxford. A bone of the leg was publicly sold by auction with the museum of a private collector a few years ago. It was understood at the time that the dishonoured relic was taken back to Windsor.