When Britain abolished slavery, plantation owners from powerful families notoriously received huge sums in compensation, while those who were enslaved got nothing.
Now evidence has come to light that Sandbach, Tinne and Company – a corporation closely linked to the merchants who got the biggest taxpayer-funded compensation payouts – continued to traffic enslaved Africans illegally after abolition to Guyana, in South America.
The discovery is detailed in a book, Searching for My Slave Roots, by author Malik Al Nasir, who has been researching his family history.
Its findings have inspired a new research project, Overwriting-Underwriting, which aims to uncover the financial networks behind enslavement and launches this month.
The Slave Trade Act of ۱۸۰۷ abolished the trade in human beings in British territories. Then, in ۱۸۳۳, the Slavery Abolition Act banned slavery itself in most of the British empire.
But an ۱۸۴۷ letter, written to Sandbach Tinne’s Liverpool office by Peter Miller Watson, who managed the company’s interests in Demerara, Guyana, refers to a ship from the company’s own fleet arriving with a “cargo of negroes”, including dozens of young children.
The letter details how the ship, called “the Parker”, was carrying “۱۱۵ adult males, ۸۶ adult females, ۸۲ under ۱۴ years, and ۴۱ under ۴ years,” adding: “There have been only three casualties during the passage – ۱ man and ۲ children – which Captain R. says may be attributed to the wretched state in which they had lived ashore.”
Malik said: “Slavery had been abolished, so how do we know the people on the Parker weren’t indentured, or Africans liberated by the Royal Navy? Firstly, Watson specifically refers to them as cargo, and not passengers, when liberated Africans were not regarded as cargo, enslaved people were called cargo.
“In referring to the ‘wretched state’ in which they had lived ashore, he’s saying they were shipped from land and are the architects of their own condition – if they had been previously enslaved blame would have been on their former masters, and they would not have been bought if they were sick. When [Watson] talks about casualties, he’s attributing the deaths as a loss of property. By process of deduction, we can see these are people illegally trafficked from Africa.”
Peter Miller Watson was a distant cousin of the British prime minister William Gladstone and the father of Andrew Watson, who became the first Black international footballer when he captained Scotland in the ۱۸۸۰s.
Meanwhile, Sandbach Tinne, which was wound up in ۱۹۷۵, was the family business of the Sandbach and Tinne families, who, along with their collaborators and relatives in the Gladstone family, dominated the Demerara sugar trade.
By the time of the ۱۸۴۷ letter, Sandbach Tinne and their subsidiaries had already received compensation equivalent to millions of pounds today for the “loss” of the people they enslaved before abolition. While family patriarch Samuel Sandbach had left the partnership in ۱۸۳۳, his son William Robertson Sandbach and son-in-law Charles Stuart Parker Jr were principal shareholders in ۱۸۴۷. British taxpayers’ debt for compensation payments to enslavers was only paid off in ۲۰۱۵.
“John Gladstone, the father of William Gladstone who owned plantations in Guyana and Jamaica, got the biggest single individual payout, while Sandbach Tinne got the second largest on aggregate – both were among architects of the compensation scheme,” Malik added.
An ۱۸۲۳ uprising in Demerara, staged by enslaved abolitionists, was a pivotal event in the fight to abolish slavery, and began on a plantation owned by John Gladstone.
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But Al Nasir said an ۱۸۴۷ missionary account detailed how unregulated trading in enslaved people existed “south of the line” – meaning enslavers evading the Royal Navy’s blockade continued to traffic people from countries below the equator, such as Angola.
The Royal Navy’s West Africa Squadron – was tasked with intercepting slavers’ ships from ۱۸۰۸, with ۱,۶۰۰ sailors losing their lives. However, it is estimated that fewer than ۱۰% of ships involved in enslaving people were intercepted.
Even when ships were successfully stopped, “liberated Africans” faced military conscription and hard, unpaid labour under the apprenticeship and indentured labour systems.
Overwriting – Underwriting launches at the Museum of Liverpool on Sunday, Unesco’s International Day of Remembrance of the Slave Trade and its Abolition.
The launch event features renowned Jamaican academic Prof Verene Shepherd as keynote speaker, and a panel including Al Nasir and Lucy Moynihan from the University of Liverpool, chaired by Michelle Charters, the head of the International Slavery Museum.
The initiative is inspired by research from Moynihan into John Gladstone’s insurance “risk books” as well as Al Nasir’s research into Sandbach Tinne.
It is a pilot for the Connector project, a National Museums Liverpool initiative to develop understanding of transatlantic slavery’s legacies, supported by a £۱m grant from Lloyd’s Register Foundation.
Maritime group Lloyd’s Register apologised for its historical role in transatlantic slavery last year. Descendants of the Sandbach family and Gladstone family have both apologised for their ancestors’ involvement in slavery.

