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It was his intention to travel to London to get the essay published in English. On his journey he stopped at Wadesmill. This is a small village on the A10 between Hertford and Royston.
Whilst resting at Wadesmill, Clarkson experienced a spiritual experience which he described 'as a direct revelation from God ordering me to devote my life to abolishing the trade.' Having written an essay on the traffic in human life he decided that if the contents of his essay were true 'it was time that some person should see these calamities to their end.' That person was to be himself.
He continued on his journey to London where he found a publisher in James Phillips, a Quaker who arranged for publication in 1786. Philips was to introduce him to others, sympathetic to the cause of abolishing slavery.
In 1787 the same year that his pamphlet 'A Summary View of the Slave Trade and of the Probable Consequences of its Abolition' was published the Committee for Effecting the Abolition of the Slave Trade was formed; having amongst its members leading Quakers such as Wilberforce, John Wesley and Josiah Wedgewood.
Clarkson was given the task of collecting information to support their arguments and his research took him to ports such as Bristol, interviewing thousands of sailors and obtaining evidence of the inhumane instruments used to constrain the human cargo.
The Committee For Abolition had to wait until 1807 for the Abolition of the Slave Trade Act and it was not until 1833 that Parliament passed the Slavery Abolition Act giving all slaves in the British Empire their freedom.
On that spot at Wadesmill a memorial stone to Thomas Clarkson was erected in 1879, surrounded by a small rail for protection. The stone reads: 'On this spot where stands this monument in the month of June 1785 Thomas Clarkson resolved to devote his life to bringing about the abolition of the slave trade.'
It was to be many years later before American slaves were able to enjoy the same freedoms. John Brown was born in 1800 in Torrington Connecticut and lived as a child in Ohio. He had always hated slavery and was instrumental in helping fugitive slaves to escape to Canada.
Eventually he settled in Osawatomie and worked to keep Kansas from becoming a slave
state. In May 1856 Brown led an expedition to Pottawatomie Creek where his men murdered
five pro-
Brown after defending the town against pro-
On the day of his execution he wrote : 'I ...am now quite certain that the crimes of this guilty land will never be purged away but with blood.'
The connection between Clarkson and Brown as anti-
The same researcher discovered only a few months after the original letter had been published that the stone monument had in fact been cleaned by a direct descendant of Thomas Clarkson. By then story of the negro cleaners had already entered into newspaper legend and is most probably still being told today, somewhere around the world.
Thomas Clarkson retired to Ipswich where he died on 26 September 1846. A fitting tribute to him was paid by the poet Coleridge: 'He, if ever human being did it, listened exclusively to his conscience, and obeyed its voice.'
© John Barber -
Note: The stone memorial was recently restored with the help of a £48000 grant from the Heritage Lottery Fund. Thomas Clarkson a distant cousin was on hand for the unveiling on Wednesday November 14 2007.
Memorial stone to Thomas Clarkson
on Wadesmill Hill, nr Hertford
More English social history
Henry Andrews + George Bradshaw + Thomas Clarkson + Charles Macintosh + Jerome K Jerome + St Bruno + Robert Tressell