When Richard was raising funds for his crusade, he was said to declare, "I would have sold London if I could find a buyer". Occupation of Sicily In September 1190 Richard and Philip arrived in Sicily. After the death of King William II of Sicily in 1189 his cousin Tancred had seized power, although the legal heir was William's aunt Constance, wife of Henry VI, Holy Roman Emperor. Tancred had imprisoned William's widow, Queen Joan, who was Richard's sister, and did not give her the money she had inherited in William's will. When Richard arrived he demanded that his sister be released and given her inheritance; she was freed on 28 September, but without the inheritance. The presence of foreign troops also caused unrest: in October, the people of Messina revolted, demanding that the foreigners leave. Richard attacked Messina, capturing it on 4 October 1190. After looting and burning the city Richard established his base there, but this created tension between Richard and Philip. He remained there until Tancred finally agreed to sign a treaty on 4 March 1191. The treaty was signed by Richard, Philip, and Tancred. Its main terms were: Joan was to receive of gold as compensation for her inheritance, which Tancred kept. Richard officially proclaimed his nephew, Arthur of Brittany, son of Geoffrey, as his heir, and Tancred promised to marry one of his daughters to Arthur when he came of age, giving a further of gold that would be returned by Richard if Arthur did not marry Tancred's daughter. The two kings stayed on in Sicily for a while, but this resulted in increasing tensions between them and their men, with Philip plotting with Tancred against Richard. The two kings finally met to clear the air and reached an agreement, including the end of Richard's betrothal to Philip's sister Alys. Conquest of Cyprus In April 1191 Richard left Messina for Acre, but a storm dispersed his large fleet. After some searching, it was discovered that the ship carrying his sister Joan and his new fiancée, Berengaria of Navarre, was anchored on the south coast of Cyprus, along with the wrecks of several other vessels, including the treasure ship. Survivors of the wrecks had been taken prisoner by the island's ruler, Isaac Komnenos. On 1 May 1191 Richard's fleet arrived in the port of Lemesos on Cyprus. He ordered Isaac to release the prisoners and treasure.