WILLIAM MARSHALL, commonly called THE YOUNGER, was one of the bold and patriotic barons who compelled king John to sign MAGNA CHARTA. He was appointed one of the twenty-five conservators of the public liberties, and was one of the chief leaders and promoters of the barons' war, being a party to the covenant for holding the city and Tower of London.[527] On the death of king John, his father the Protector brought him over to the cause of the young king Henry, the rightful heir to the throne, whom he served with zeal and fidelity. He was a gallant soldier, and greatly distinguished himself in a campaign in Wales. He overthrew Prince Llewellyn in battle with the loss of eight thousand men, and laid waste the dominions of that prince with fire and sword.[528] For these services he had scutage of all his tenants in _twenty counties in England_! He was made governor of the castles of Cardigan and Carmarthen, and received various marks of royal favour. In the fourteenth year of the reign of king Henry the Third, he was made captain-general of the king's forces in Brittany, and, whilst absent in that country, a war broke out in Ireland, whereupon he was sent to that kingdom with a considerable army to restore tranquillity. He married Eleanor, the daughter of king John by the beautiful Isabella of Angoulême, and he was consequently the brother-in-law of the young king Henry the Third.[529] He died without issue, A. D. 1231, (15 Hen. III.,) and on the 14th of April he was buried in the Temple Church at London, by the side of his father the Protector. He was greatly beloved by king Henry the Third, who attended his funeral, and Matthew Paris tells us, that when the king saw the dead body covered with the mournful pall, he heaved a deep sigh, and was greatly affected.[530] The manors, castles, estates, and possessions of this powerful nobleman in England, Wales, Ireland, and Normandy, were immense. He gave extensive forest lands to the monks of Tinterne in Wales; he founded the monastery of Friars preachers in Dublin, and to the Templars he gave the church of Westone with all its appurtenances, and granted and confirmed to them the borough of Baudac, the estate of Langenache, with various lands, windmills, and _villeins_ of the soil.[531] GILBERT MARSHALL, EARL OF PEMBROKE, brother to the above, and third son of the Protector, succeeded to the earldom and the vast estates of his ancestors on the melancholy murder in Ireland of his gallant brother Richard, "the flower of the chivalry of that time," (A. D. 1234.) The year after his accession to the title he married Margaret, the daughter of the king of Scotland, who is described by Matthew Paris as "a most elegant girl,"[532] and received with her a splendid dowry. In the year 1236 he assumed the cross, and joined the king's brother, the earl of Cornwall, in the promotion of a Crusade to the Holy Land.