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Over the spanning nearly four hundred years, the Atlantic slave trafficking system saw 12.5 million Africans forcibly taken from their homelands to the Americas. A staggering 1.8 million of those souls perished during the voyage, subjected to unfathomable conditions of extreme confinement, filth, and illness. Many chose to end their suffering by throwing themselves overboard, while still more were callously thrown into the sea.

Two Interwoven Narratives

In The Zorg, author Siddharth Kara presents two interconnected narratives. The first details a horrific incident aboard the eponymous slave ship—the deliberate murder 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, driven in large part by the dedicated work of a dazzling array of abolitionist activists. Among them was Olaudah Equiano, who wrote 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 economic power was responsible for 40% of Europe's slave trade. Financing slavery was a lucrative venture for everyone from the elites but also the common people. One such entrepreneur, William Gregson, accumulated his earnings from his trade, invested 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 set sail from Liverpool for West Africa in October 1780 under Captain Richard Hanley. Its hold was loaded with commodities like tobacco, firearms, knives, and various “India goods” such as chintz and cowrie shells—the shells being a common currency in the purchase 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 departed the Netherlands. With Britain at war with the Dutch in late 1780, the Royal Navy granted British ships permission to seize Dutch property at sea—a virtual license for piracy. The Zorg was soon captured by a British captain and held off the Gold Coast. Meanwhile, Captain Hanley, during one of his voyages, picked up a fleeing British governor named Robert Stubbs, who had been expelled for graft.

A Voyage into Hell

When Hanley reached Cape Coast Castle—a fortress with a vast slave dungeon beneath it—he assumed control of the captured Zorg. He then severely overcrowd it with enslaved people, put a dozen of his own crew on board, and appointed Luke Collingwood, a ship's surgeon of dubious nautical skill, its captain. In August 1781, the Zorg left Accra carrying 442 captives, 17 crew members, and one depraved passenger: the former governor, Robert Stubbs.

Kara excels in using contemporaneous sources to bring to life the collective nightmare of being trafficked on a slave ship.

The Zorg's journey was plagued with calamity. "The flux" ravaged the vessel, followed by scurvy. The captain fell ill, lost his senses, and handed command over to Stubbs. Thus, “a ship full of decay and death was being commanded by a passenger.” Kara effectively employs eyewitness accounts to illustrate of the sheer horror. The graphic testimony of Alexander Falconbridge, a doctor who became an activist, describes how the enslaved people's skin was often rubbed raw to the bone from being packed 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 resolved to jettison a number of the captives, who had already endured months of appalling conditions below deck. This unspeakable act was not motivated by ensuring survival—the Africans had pleaded to be allowed to live, even without water rations—but by cold economic greed. Ship insurance policies did not cover deaths from disease, but they would pay for cargo jettisoned out of “necessity” for the ship's safety. Over several days, the crew murdered “those Africans who would be worth less at auction”—the infirm, the sick, along with women and children, among them a baby born during the voyage.

The Courtroom Battle

Back in Liverpool, investor William Gregson was dissatisfied with the profit on his investment. He submitted an insurance claim for £30 per lost slave—a substantial sum in today's money. The insurers declined to pay. In March 1783, Gregson sued and won a trial by jury, with his lawyers arguing 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.” Just twelve days after the trial, an anonymous letter appeared in a widely read English newspaper. The author, who claimed to have been present the court proceedings, made a powerful case against slavery, citing the Zorg case as a prime example of its brutality. Olaudah Equiano saw the letter and took it to the activist Granville Sharp, who petitioned for a new trial. At the following hearing, the events on the Zorg were examined in meticulous 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 convened. Over the subsequent years, they petitioned, made speeches, organized campaigns, and meticulously documented 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 enacted in 1807.

An Enduring Impact

The debate over who or what deserves credit for abolition is a matter of debate. The Zorg's influence, however, is visibly 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 sustained public movement was unprecedented, serving as an testament to the power of persistent activism, the pen, and relentless persistence.

The Author's Approach

Unlike his other work—such as the Pulitzer finalist Cobalt Red—Kara has had to address certain lacunae in the available documentation. At times, imaginative flourishes contrast with scrupulously factual accounts, giving the book a somewhat chimeric feel. A blend of narrative suspense and part historical analysis, The Zorg nevertheless succeeds in shedding light on one of history's most horrific episodes, using powerful storytelling and documented fact to assemble a portrait that stays with the reader long after the final page.