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Over the spanning nearly four hundred years, the transatlantic slave trade saw 12.5 million Africans forcibly taken from their continent to the Americas. A devastating 1.8 million of those souls died during the Middle Passage, enduring unfathomable conditions of extreme confinement, filth, and disease. Many took their own lives by leaping overboard, whereas others were callously thrown into the sea.

A Tale of Two Stories

In The Zorg, author Siddharth Kara weaves together two interconnected narratives. The first details a horrific incident aboard the eponymous slave ship—the systematic drowning of 132 captive individuals by its British crew. The second story examines how this event came to influence the abolition of the Atlantic slave trade in 1807, thanks largely by the relentless efforts of a dazzling array of abolitionist activists. Among them was Olaudah Equiano, who authored one of the rare first-person narratives of the Middle Passage, describing it as “a scene of horror almost inconceivable”.

Liverpool's Central Role

The account begins in Liverpool, a port city that at the peak of its prosperity was accountable for 40% of Europe's slave trade. Investing in slavery was a lucrative venture for everyone from the elites to the working classes. One such investor, William Gregson, accumulated his wages from his trade, ploughed them into the slave trade, and eventually became a prominent citizen and later mayor. Gregson provided the funds for the slave ship The William, which departed from Liverpool for West Africa in October 1780 under Captain Richard Hanley. Its hold was loaded with commodities like tobacco, firearms, knives, and so-called “India goods” such as chintz and cowrie shells—the shells being a standard rate in the acquisition of enslaved people.

The Capture of the Zorg

Concurrently, a Dutch slave vessel named the Zorg (later anglicized by the British as the Zong) had left the Netherlands. With Britain at war with the Dutch in late 1780, the Royal Navy gave British ships permission to seize Dutch ships at sea—a de facto license for piracy. The Zorg was soon taken by a British captain and held off the Gold Coast. Meanwhile, Captain Hanley, during one of his voyages, picked up a disgraced British governor named Robert Stubbs, who had been expelled for corruption.

The Nightmare Passage

When Hanley arrived at Cape Coast Castle—a stronghold with a notorious holding cell beneath it—he took command of the captured Zorg. He proceeded to grossly overload it with enslaved people, put a dozen of his own crew on board, and made Luke Collingwood, a ship's surgeon of dubious nautical skill, its captain. In August 1781, the Zorg left Accra carrying 442 enslaved Africans, 17 crew members, and one notorious passenger: the former governor, Robert Stubbs.

Kara is particularly skilled at using contemporaneous sources to bring to life the general hell of being trafficked on a slave ship.

The Zorg's journey was fraught with calamity. Dysentery ravaged the vessel, followed by scurvy. The captain fell ill, became delirious, and handed command over to Stubbs. Thus, “a ship full of decay and death was being commanded by a passenger.” Kara masterfully utilizes period testimonies to illustrate of the sheer horror. The powerful testimony of Alexander Falconbridge, a ship's surgeon turned abolitionist, describes how the captives' skin was often rubbed raw to the bone from lying on bare wood, their flesh pinched and torn between the planks.

A Calculated Atrocity

By late November 1781, the Zorg was still miles from Jamaica and dangerously short on water. The crew made the decision to throw overboard a number of the captives, who had already suffered through months of obscene conditions below deck. This unspeakable act was not motivated by preserving life—the Africans had pleaded to be allowed to live, even without water rations—but by cold economic greed. Ship insurance policies did not cover losses from disease, but they did cover cargo discarded out of “necessity” for the ship's safety. Over several days, the crew murdered “those Africans who would be worth less at auction”—the weak, the sick, along with women and children, even a baby born during the voyage.

The Courtroom Battle

Back in Liverpool, investor William Gregson was dissatisfied with the financial return on his investment. He filed an insurance claim for £30 per lost slave—a considerable sum in today's money. The insurers refused to pay. In March 1783, Gregson took them to court and won a trial by jury, with his lawyers claiming that throwing the enslaved people overboard had been “necessary.”

The Spark for Abolition

According to Kara, “there is a direct line of causality between the public exposure of the Zorg murders and the first movement to abolish slavery in England.” Merely twelve days after the trial, an published essay appeared in a widely read English newspaper. The author, who claimed to have been present the court proceedings, made a powerful case against slavery, using the Zorg case as a key illustration of its inherent evil. Olaudah Equiano saw the letter and took it to the activist Granville Sharp, who petitioned for a new trial. At the subsequent hearing, the events on the Zorg were reviewed in forensic detail, exactly what the abolitionists had hoped for.

A Sustained Campaign

In the spring of 1787, the founding members of the Society for Effecting the Abolition of the Slave Trade first met. Over the following years, they petitioned, orated, organized campaigns, and gathered evidence on the particulars of the slave trade. “Their efforts,” Kara writes, “would lay a blueprint for the pursuit of social justice.” After years of setbacks, the Act for the Abolition of the Slave Trade was finally passed in 1807.

A Lasting Legacy

The debate over who or what should be credited for abolition is contentious. The Zorg's legacy, however, is powerfully evident in J.M.W. Turner's famous painting, The Slave Ship, which was inspired by the events of 1781. While slavery has been widespread in human history, its abolition following a prolonged mass campaign was unprecedented, serving as an affirmation to the power of moral courage, the pen, and unwavering determination.

Kara's Narrative Method

Unlike his previous books—such as the acclaimed Cobalt Red—Kara has had to fill in certain gaps in the historical record. Consequently, imaginative flourishes contrast with rigorously researched accounts, giving the book a somewhat chimeric feel. Part thriller and part historical analysis, The Zorg nevertheless succeeds in shedding light on one of history's darkest chapters, using powerful storytelling and meticulous research to create a account that stays with the reader well after the final page.