By the 18th century, 45,000 Africans are transported annually on British ships ... 1741: Fires break out in New York City, which has the second-largest urban population of blacks.

Around 1750, the British mainland American colonies had a ... Each year 3,500 black captives arrived from Africa or the Caribbean. Nearly 1 in 5 Americans, or 300,000 people, were enslaved.