Fulk le Jeune returned to Anjou in early 1121. He learned that William Adelin, his new son-in-law William had drowned in the shipwreck of the White Ship. The treaty with Anjou then died with Henry's son. Fulk's daughter Matilda was safe; she had not been on the White ship. Fulk demanded her return to Anjou. But Henry delayed her return and kept part of her dowry. By 1122 she was back in Anjou. Fulk broke off all relations with Henry and made another marriage alliance with Henry's nephew and enemy, William Clito. William was to marry Fulk's daughter Sibyl. He again gave his new son-in-law the lordship of Maine as her dowry. As Henry dealt with his rebel Norman barons one by one, by 1124 Fulk V was William Clito's only supporter. Henry now did everything he could to get the pope to annul the marriage between William Clito and Sibyl. On 26 August 1124 Pope Calixtus II annulled the marriage of William Clito and Sibyl because they were too closely related.