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Over the course of nearly four centuries, the transatlantic slave trade saw 12.5 million Africans trafficked from their homelands to the Americas. A staggering 1.8 million of those souls perished during the Middle Passage, subjected to scarcely imaginable conditions of extreme confinement, squalor, and illness. Some chose to end their suffering by leaping overboard, whereas still more were callously thrown into the sea.

A Tale of Two Stories

In The Zorg, author Siddharth Kara presents two interconnected narratives. The first chronicles 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 atrocity came to influence the ending of the Atlantic slave trade in 1807, thanks largely by the relentless efforts of a coalition of committed campaigners. Among them was Olaudah Equiano, who authored one of the few surviving first-person narratives of the Middle Passage, describing it as “a scene of horror almost inconceivable”.

Liverpool's Central Role

The account originates in Liverpool, a port city that at the peak of its economic power 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, saved up his wages from rope-making, 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 departed from Liverpool for West Africa in October 1780 under Captain Richard Hanley. Its cargo was loaded with commodities like tobacco, firearms, knives, and various “India goods” such as chintz and cowrie shells—the latter being a standard rate in the acquisition of human beings.

A Ship Seized

Around the same time, a Dutch slave vessel named the Zorg (later referred to by the British as the Zong) had left the Netherlands. With Britain declaring war on the Dutch in late 1780, the Royal Navy gave British ships authority to capture Dutch property at sea—a virtual sanctioning of piracy. The Zorg was soon captured by a British captain and held off the Gold Coast. Meanwhile, Captain Hanley, on a slaving expedition, took aboard a disgraced 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 proceeded to severely overcrowd it with enslaved people, put a dozen of his own crew on board, and appointed Luke Collingwood, a ship's surgeon of questionable 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 excels in using contemporaneous sources to vividly reconstruct the collective nightmare of being trafficked on a slave ship.

The Zorg's journey was fraught with calamity. "The flux" swept through the vessel, and then scurvy. The captain succumbed to sickness, lost his senses, and appointed Stubbs. Thus, “a ship full of decay and death was being commanded by a passenger.” Kara effectively employs period testimonies to paint a picture of the sheer horror. The graphic testimony of Alexander Falconbridge, a doctor who became an activist, describes how the captives' skin was frequently rubbed raw to the bone from being packed on bare wood, their flesh caught between the planks.

The Unspeakable Decision

By late November 1781, the Zorg was still miles from Jamaica and critically short on water. The crew made the decision to throw overboard a number of the enslaved Africans, who had already endured months of obscene conditions below deck. This monstrous act was not motivated by ensuring survival—the Africans had pleaded to be allowed to live, even without water rations—but by pure economic greed. Ship insurance policies did not cover losses from natural causes, but they would pay for cargo discarded out of “necessity” for the ship's safety. Over a period of days, the crew drowned “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.

Insurance and Injustice

Back in Liverpool, investor William Gregson was dissatisfied with the financial return on his investment. He filed an insurance claim for £30 per drowned captive—a substantial sum in today's money. The insurers declined to pay. In March 1783, Gregson sued and was awarded 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.” Merely twelve days after the trial, an published essay appeared in a prominent English newspaper. The author, who claimed to have attended the court proceedings, made a powerful case against slavery, citing the Zorg case as a prime example of its inherent evil. Olaudah Equiano read the letter and took it to the activist Granville Sharp, who filed a motion for a new trial. At the following hearing, the events on the Zorg were examined in forensic detail, precisely what the abolitionists had wanted.

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, lobbied tirelessly, 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 enacted in 1807.

A Lasting Legacy

The debate over who or what deserves credit for abolition remains contentious. The Zorg's influence, however, is powerfully captured by J.M.W. Turner's famous painting, The Slave Ship, which was based on the events of 1781. While slavery has been widespread in human history, its abolition following a sustained public movement was historic, serving as an affirmation to the power of persistent activism, the pen, and unwavering persistence.

The Author's Approach

Unlike his other work—such as the acclaimed Cobalt Red—Kara has had to fill in certain gaps 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 serious nonfiction, The Zorg ultimately manages to shedding light on one of history's darkest chapters, using compelling prose and documented fact to assemble a portrait that haunts the reader well after the final page.