The company then proceeded to gain incorporation through act of parliament. However this too received opposition, particularly from the Committee of the Company of Merchants Trading to Africa, who called a meeting in March 1791. This led to three petitions being organised by slave trade merchants in London, Liverpool and Bristol. Slave traders in Lancaster also organised a petition as did the Africa Company. Further opposition was organised by the Standing Committee of West India Planters and Merchants, who arranged for two meetings with William Pitt, the Prime Minister. Nevertheless, Henry Thornton was able to successfully guide the Sierra Leone settlement bill through parliament, despite the efforts of the Liverpool MP Bamber Gascoyne and other anti-abolitionists. On 30 May 1791, the bill was passed 87 votes to 9. In 1792, John Clarkson led over 1100 black settlers from Halifax, Nova Scotia, to establish a new colony and it was on this basis that the Nova Scotian Settlers founded Freetown, Sierra Leone. The majority of these settlers were former slaves of the American colonies, freed by the British during the American Revolution and forced to relocate after the British defeat. It was the determination of these settlers that caused Freetown to take shape and survive after they founded it in March 1792. The Company issued decimal currency in the form of dollars and cents struck by Matthew Boulton at Soho Mint and issued in 1791 (although these coins did not circulate until the founding of the Colony in 1792) and 1796. When war broke out between Great Britain and France (one of the French Revolutionary Wars) the Company lost supplies and a number of ships to privateers and the French navy. American merchantmen, as neutral traders, used the opportunity to establish trade. Trouble continued, though, for in September 1794 the French burned Freetown in a raid. The colonists rebuilt, and American merchants aided by selling the company vital supplies. During these years the colony's acting governor, Zachary Macaulay, and his council agreed to accept American blacks as settlers with a gift of free Sierra Leone land if they met four criteria: they must have letters of recommendation of their upright character from their clergy, they must agree to become British subjects and abide by British law, they must secure their own passage to the colony, and they must clear at least one third of the land given to them for agriculture within two years of arrival. The Sierra Leone Company was succeeded in 1807 by the African Institution