The paper, from 1817, provides details about the name of his slave, his age and the realisation that slavery is immoral.

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However, he later discovered that this was the name of a Kanuri slave-trader who captured and sold his kinsmen.

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An IPCC spokesperson said the complainant, who is Afro-Caribbean, had taken offence after a civilian staff member who was interviewing him, said his name would have originated from slave plantations.

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And "Beloved, " starring Oprah Winfrey and based on Toni Morrison's novel of the same name, is the story of a former slave visited by the ghost of the daughter that she killed.

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