Complex sentence: Growth of the city and trade came with the rise of England's American colonies in the 17th century and the rapid 18th century expansion of England's role in the Atlantic trade in Africans taken for slavery to the Americas.
Split into simpler sentences: Growth of the city and trade came with the rise of England's American colonies in the 17th century. The 18th century saw an expansion of England's role in the Atlantic trade in Africans taken for slavery to the Americas.