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Over the course of nearly four hundred years, the transatlantic slave trade resulted in 12.5 million Africans trafficked from their continent to the Americas. A devastating 1.8 million of those individuals died during the voyage, enduring unfathomable conditions of extreme confinement, filth, and illness. Many took their own lives by leaping overboard, whereas 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 harrowing incident aboard the eponymous slave ship—the deliberate murder of 132 captive individuals by its British crew. The second story examines how this atrocity played a pivotal role in the ending of the Atlantic slave trade in 1807, thanks largely by the relentless efforts of a dazzling array of committed campaigners. Among them was Olaudah Equiano, who authored one of the rare first-person accounts of the Middle Passage, describing it as “a scene of horror almost inconceivable”.

Liverpool's Central Role

The tale begins in Liverpool, a port city that at the height of its prosperity was responsible for 40% of Europe's slave trafficking. Financing slavery was a highly profitable venture for not just the wealthy to the common people. One such investor, William Gregson, accumulated his wages from his trade, ploughed them into the slave trade, and eventually became a wealthy burgher and even mayor. Gregson financed the slave ship The William, which departed from Liverpool for West Africa in October 1780 under Captain Richard Hanley. Its hold was filled with trade goods like tobacco, firearms, knives, and so-called “India goods” such as chintz and cowrie shells—the latter being a common currency 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 declaring war on the Dutch in late 1780, the Royal Navy granted British ships permission to capture Dutch ships at sea—a de facto sanctioning of piracy. The Zorg was soon taken by a British captain and held off the Gold Coast. Meanwhile, Captain Hanley, on a slaving expedition, picked up a disgraced British governor named Robert Stubbs, who had been removed for corruption.

The Nightmare Passage

When Hanley arrived at Cape Coast Castle—a stronghold with a notorious slave dungeon 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 questionable seamanship, its captain. In August 1781, the Zorg finally left Accra carrying 442 enslaved Africans, 17 crew members, and one notorious passenger: the former governor, Robert Stubbs.

Kara excels in using historical documents to vividly reconstruct the collective nightmare of being trafficked 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 doctor who became an activist, details how the captives' skin was often rubbed raw to the bone from being packed on bare wood, their flesh caught between the planks.

A Calculated Atrocity

By late November 1781, the Zorg was far from Jamaica and dangerously short on water. The crew resolved to throw overboard a number of the captives, who had already suffered through months of appalling conditions below deck. This monstrous act was not motivated by ensuring survival—the Africans had begged to be allowed to live, even without water rations—but by pure economic greed. Ship insurance policies did not cover deaths 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 murdered “those Africans who would be worth less at auction”—the weak, 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 unhappy about the financial return on his investment. He filed an insurance claim for £30 per drowned captive—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 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.” Just twelve days after the trial, an published essay appeared in a prominent English newspaper. The author, who claimed to have attended the court proceedings, argued compellingly against slavery, using the Zorg case as a prime example of its brutality. Olaudah Equiano saw the letter and took it to the activist Granville Sharp, who filed a motion for a new trial. At the subsequent hearing, the events on the Zorg were reviewed in forensic detail, exactly 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 first met. Over the subsequent years, they petitioned, orated, 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 struggles, the Act for the Abolition of the Slave Trade was finally passed in 1807.

A Lasting Legacy

The question of who or what should be credited for abolition is contentious. The Zorg's legacy, however, is powerfully captured by J.M.W. Turner's famous painting, The Slave Ship, which was inspired by the events of 1781. While slavery has been near-universal in human history, its abolition following a sustained mass campaign was historic, serving as an testament to the power of moral courage, the pen, and relentless persistence.

Kara's Narrative Method

In contrast to his previous books—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 slightly hybrid feel. A blend of narrative suspense and part historical analysis, The Zorg ultimately succeeds in shedding light on one of history's most horrific episodes, using compelling prose and meticulous research to assemble a account that haunts the reader well after the final page.