Amalric died unexpectedly on 11 July 1174. His son by his first marriage, Baldwin IV, was crowned king two weeks later. Before long, it became obvious that Baldwin suffered from lepromatous leprosy. To secure the succession of the ailing king, his sister, Sybilla, was given in marriage to William of Montferrat in November 1176, but he died seven months later. Baldwin's cousin, Philip I, Count of Flanders, who landed at Acre in August, offered Robert of Bethune for Sybilla's new husband, also proposing that Isabella (who was Baldwin's and Sybilla's half-sister) should marry Robert's younger brother, William of Bethune. The High Court of Jerusalem refused both proposals.