Let's put this in some historical light. The British government abolished the slave trade in 1833 - 1838 and this was a big step (even if other schemes were in

Let's put this in some historical light. The British government abolished the slave trade in 1833 - 1838 and this was a big step (even if other schemes were in effect slavery). Only one monument was erected to commemorate this. Protagonists, e.g. William Wilberforce have statues however the event itself - abolition - only has this one memorial. It was built by a wealthy Quaker and served as the entrance arch for his mansion. Step forward 150 years and this might be the one and only memorial 'made at the time' to the work of our hero.