,
Cumbria After his return from the Holy Land in late 1185 or early 1186, William rejoined the court of King Henry II and served as a loyal captain through the many difficulties of Henry's final years. The returns of royal favour were almost immediate. The king gave William the large royal estate of
Cartmel in Cumbria and the keeping of Heloise, the heiress of the northern barony of Lancaster. It may be that the king expected him to take the opportunity to marry her and become a northern baron, but William seems to have had grander ambitions for his marriage. In 1188, faced with an attempt by
Philip II to seize the disputed region of
Berry, Henry summoned William to his side. The letter by which he did this survives and makes some sarcastic comments about William's complaints that he had not been properly rewarded to date for his service to the king. Henry therefore promised him the marriage and lands of Dionisia,
lady of Châteauroux in Berry. In the resulting campaign, the king fell out with his heir Richard, count of
Poitou, who consequently allied with Philip II against his father. In 1189 while covering the flight of Henry from
Le Mans to
Chinon, William unhorsed Richard in a skirmish. William could have killed the prince but killed his horse instead, to make that point clear. He is said to have been the only man ever to unhorse Richard. Nonetheless, after Henry's death William was welcomed at court by Richard, apparently recognising that William's loyalty and military accomplishments were too useful to ignore, especially for a king who was intending to go on crusade. During Henry's last days he had promised William the hand and estates of
Isabel de Clare but had not completed the arrangements. King Richard, however, confirmed the offer and so in August 1189, William and Isabel married. William acquired large estates and claims in England, Wales,
Normandy and Ireland. Some estates, however, were excluded from the deal. Marshal did not obtain Pembroke and the title of earl, which his father-in-law had enjoyed, until 1199, as it had been taken into the king's hand in 1154. However, the marriage transformed the landless knight from a minor family into one of the richest men in the kingdom, a sign of his power and prestige at court. They had five sons and five daughters, and have numerous descendants. William made many improvements to his wife's lands, including extensive additions to
Pembroke Castle and
Chepstow Castle. Even though the marriage was a reward for his political and military services, and despite a significant age difference, the couple appear to have developed a real love and affection for each other. It is also notable that there is no evidence that Marshal ever took a mistress, which was commonplace for nobles and often widely discussed and reported. William was included in the council of regency which Richard appointed on his departure for the
Third Crusade in 1190. He took the side of John, the king's brother, when the latter expelled Justiciar
William Longchamp from the kingdom, but he soon discovered that the interests of John were different from those of Richard. Hence in 1193 he joined with the loyalists in making war upon him. In the spring of 1194 during the course of the hostilities in England and before Richard's return, William's elder brother John Marshal (who was serving as
seneschal) was killed while defending
Marlborough for John. Richard allowed William to succeed his brother in the hereditary
marshalship and his paternal honour of
Hamstead Marshall. William served Richard in his wars in Normandy against Philip II. On Richard's deathbed, he designated William as custodian of
Rouen and of the royal treasure during the
interregnum. ==King John and Magna Carta==