Elizabeth requesting a payment of 100,000 pounds in advance to king Ahmad for the supply of a fleet, and Ahmad asking for a tall ship to be sent to get the money. Elizabeth "agreed to sell munitions supplies to Morocco, and she and Mulai Ahmad al-Mansur talked on and off about mounting a joint operation against the Spanish". Discussions however remained inconclusive, and both rulers died within two years of the embassy. James I and Charles I Morocco had been falling into a state of anarchy following the death of Ahmed al-Mansur in 1603, and local warlords had been on the rise, making the alliance with the Sultanate less and less meaningful. James I also made peace with Spain upon his accession in 1603, with the Treaty of London. Relations continued under James I however, who sent his ambassador John Harrisson to Muley Zaydan in 1610 and again in 1613 and 1615 in order to obtain the release of English captives in Morocco. English privateers such as Jack Ward continued to prosper in collaboration with the Barbary states, including Morocco. During the Thirty Years' War under the rule of Charles I, England sought Moroccan military help against Spain in Tetouan and Salé. England had hoped to obtain Moroccan cooperation after the 1625 English attack on Cadíz, but the campaign proved disastrous and ruined the prestige of England. On 10 May 1627, England passed an agreement with one of these local warlords, the Mujahidin leader Sidi Al-Ayyashi to obtain his help in releasing English captives, in exchanges for the supply of provisions and arms. England and Al-Ayyashi collaborated for a period of about 10 years, as in the attempted coordinated liberation of Al Ma'mura. In 1632, the city of Salé, a major harbour to piracy, was jointly taken by an English squadron and Moroccan forces, permitting the pacification of the city and the release of Christian prisoners. On May 13, 1637, a Convention was signed between Charles I and Sidi Mohammed el-Ayachi, master of Salé, allowing for the supply of military armament to the Sultan. Embassies of Mulay Ismail Relations continued under the Moroccan ruler Mulay Ismail. In 1682, he sent Mohammed bin Hadou as Moroccan ambassador sent to the English court of Charles II. Mohammed spent six months in England, in a highly commented visit. He visited Oxford, Cambridge and the Royal Society among many other places. These exchanges forty