permanently in larger numbers during the 17th century, establishing colonies at Bristol's Hope and Cuper's Cove. Growth of the city and trade came with the rise of England's American colonies in the 17th century. Bristol's location on the west side of Great Britain gave its ships an advantage in sailing to and from the New World, and the city's merchants made the most of it, with the city becoming one of the two leading outports in all of England by the middle of the 18th century. Bristol was the slave capital of England: In 1755, it had the largest number of slave traders in the country with 237, as against London's 147. It was a major supplier of slaves to South Carolina before 1750. The 18th century saw an expansion of Bristol's population (45,000 in 1750) and its role in the Atlantic trade in Africans taken for slavery to the Americas. Bristol and later Liverpool became centres of the Triangular Trade. Manufactured goods were shipped to West Africa and exchanged for Africans; the enslaved captives were transported across the Atlantic to the Americas in the Middle Passage under brutal conditions. Plantation goods such as sugar, tobacco, rum, rice, cotton and a few slaves (sold to the aristocracy as house servants) returned across the Atlantic to England. Some household slaves were baptised in the hope this would lead them to be freed. The Somersett Case of 1772 clarified that slavery was illegal in England. At the height of the Bristol slave trade from 1700 to 1807, more than 2,000 slave ships carried a conservatively estimated 500,000 people from Africa to slavery in the Americas. In 1739, John Wesley founded the first Methodist chapel, the New Room, in Bristol. Wesley, along with his brother Charles Wesley and George Whitefield, preached to large congregations in Bristol and the neighbouring village of Kingswood, often in the open air. Wesley published a pamphlet on slavery, titled Thoughts Upon Slavery, in 1774 and the Society of Friends began lobbying against slavery in Bristol in 1783. The city's scions remained nonetheless strongly anti-abolitionist. Thomas Clarkson came to Bristol to study the slave trade and gained access to the Society of Merchant Venturers records. One of his contacts was the owner of the Seven Stars public house, who boarded sailors Clarkson sought to meet. Through these sailors he was able to observe how slaver captains and first mates