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Over the course of nearly four centuries, the transatlantic slave trade resulted in 12.5 million Africans forcibly taken from their homelands to the Americas. A devastating 1.8 million of those individuals perished during the Middle Passage, enduring scarcely imaginable conditions of overcrowding, squalor, and disease. Many took their own lives by throwing themselves overboard, whereas still more were forcibly cast into the sea.

Two Interwoven Narratives

In The Zorg, author Siddharth Kara weaves together two parallel 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 explores how this event came to influence the abolition of the Atlantic slave trade in 1807, driven in large part by the relentless efforts of a coalition 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 height of its economic power was accountable for 40% of Europe's slave trade. Financing slavery was a lucrative venture for everyone from the elites to the working classes. One such entrepreneur, William Gregson, accumulated his earnings from rope-making, invested them into the slave trade, and rose to become a wealthy burgher and even 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 filled with commodities like tobacco, firearms, knives, and so-called “India goods” such as chintz and cowrie shells—the latter being a common currency in the purchase of enslaved people.

The Capture of the Zorg

Around the same time, a Dutch slave vessel named the Zorg (later anglicized by the British as the Zong) had left the Netherlands. With Britain declaring war on the Dutch in late 1780, the Royal Navy granted British ships authority to capture Dutch ships at sea—a de facto sanctioning of privateering. The Zorg was subsequently captured by a British captain and held off the Gold Coast. Meanwhile, Captain Hanley, on a slaving expedition, took aboard a fleeing British governor named Robert Stubbs, who had been expelled for corruption.

A Voyage into Hell

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

Kara excels in using historical documents to bring to life the general hell of being transported on a slave ship.

The Zorg's journey was fraught with calamity. Dysentery swept through the vessel, followed by 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 unmitigated terror. The graphic testimony of Alexander Falconbridge, a ship's surgeon turned abolitionist, 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 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 appalling conditions below deck. This unspeakable act was not motivated by preserving life—the Africans had begged to be spared, even without water rations—but by cold economic greed. Maritime insurance policies did not cover deaths from natural causes, but they would pay for cargo jettisoned out of “necessity” for the ship's safety. Over a period of days, the crew murdered “those Africans who would be worth less at auction”—the weak, the sick, including women and children, among them a baby born during the voyage.

Insurance and Injustice

Back in Liverpool, investor William Gregson was unhappy about the profit 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 sued and won a trial by jury, with his lawyers arguing that throwing the enslaved people overboard had been “necessary.”

Catalyzing the Movement

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 prominent 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 prime example of its inherent evil. Olaudah Equiano saw 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.

The Road to 1807

In the spring of 1787, the initial group of the Society for Effecting the Abolition of the Slave Trade convened. Over the subsequent years, they wrote letters, orated, 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 struggles, 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 near-universal in human history, its abolition following a sustained public movement was historic, serving as an testament to the power of persistent activism, the pen, and unwavering determination.

The Author's Approach

Unlike his previous books—such as the acclaimed Cobalt Red—Kara has had to fill in certain gaps in the available documentation. At times, speculative passages sit awkwardly next to scrupulously factual accounts, giving the book a somewhat hybrid feel. A blend of narrative suspense and part historical analysis, The Zorg ultimately manages to illuminating one of history's darkest chapters, using compelling prose and meticulous research to create a portrait that haunts the reader long after the final page.