The table below shows the figures for slave trade through the main British ports in 1771.
|Port||Number of ships||Slaves|
Glasgow also carried half of Europe's tobacco trade at this time, an industry which depended upon slave labour to grow the tobacco in Britain's colonies in the Americas.
The slave trade brought a great deal of wealth to the British ports that were involved. Two hundred years ago the average working person earned £35 a year. A single slave in good condition could be sold in the Caribbean for £25.
Many other cities also grew rich on the profits of industries which depended on slave-produced materials such as cotton, sugar and tobacco.
Ports such as Bristol, Liverpool and Glasgow sent out many slave ships each year, bringing great prosperity to their owners: