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Over the course of nearly four hundred years, 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 souls died during the Middle Passage, subjected to unfathomable conditions of extreme confinement, squalor, and illness. Many took their own lives by leaping overboard, whereas others were forcibly cast into the sea.

Two Interwoven Narratives

In The Zorg, author Siddharth Kara weaves together two parallel narratives. The first details a harrowing incident aboard the eponymous slave ship—the systematic drowning of 132 captive individuals by its British crew. The second story examines how this event 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 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 height of its economic power was accountable for 40% of Europe's slave trade. Investing in slavery was a lucrative venture for not just the elites to the working classes. One such entrepreneur, William Gregson, saved up his earnings from rope-making, ploughed them into the slave trade, and eventually became a prominent citizen and even 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 filled 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 declaring war on the Dutch in late 1780, the Royal Navy granted British ships permission to capture Dutch ships at sea—a de facto license for piracy. The Zorg was subsequently captured by a British captain and anchored off the Gold Coast. Meanwhile, Captain Hanley, during one of his voyages, picked up a fleeing British governor named Robert Stubbs, who had been removed for corruption.

A Voyage into Hell

When Hanley reached Cape Coast Castle—a fortress 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 appointed Luke Collingwood, a ship's surgeon of dubious 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 contemporaneous sources to bring to life the collective nightmare of being trafficked on a slave ship.

The Zorg's journey was fraught with calamity. "The flux" swept through the vessel, followed by scurvy. The captain succumbed to sickness, lost his senses, 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 paint a picture of the unmitigated terror. The graphic testimony of Alexander Falconbridge, a ship's surgeon turned abolitionist, details how the captives' skin was often worn down to the bone from lying on bare wood, their flesh caught between the planks.

A Calculated Atrocity

By late November 1781, the Zorg was miles from Jamaica and dangerously short on water. The crew resolved to jettison a number of the captives, who had already suffered through 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. Maritime insurance policies did not cover losses from natural causes, 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, among them a baby born during the voyage.

Insurance and Injustice

Back in Liverpool, investor William Gregson was dissatisfied with the profit 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 took them to court 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 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 following hearing, the events on the Zorg were examined in forensic detail, precisely what the abolitionists had hoped for.

The Road to 1807

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 wrote letters, orated, lobbied tirelessly, and meticulously documented the realities 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.

An Enduring Impact

The question of who or what should be credited for abolition remains contentious. The Zorg's legacy, 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 unprecedented, serving as an affirmation to the power of moral courage, the pen, and unwavering persistence.

The Author's Approach

Unlike his previous books—such as the acclaimed Cobalt Red—Kara has had to fill in certain lacunae in the historical record. At times, imaginative flourishes contrast with scrupulously factual accounts, giving the book a slightly chimeric feel. Part thriller and part historical analysis, The Zorg ultimately manages to shedding light on one of history's most horrific episodes, using powerful storytelling and meticulous research to create a portrait that stays with the reader long after the final page.