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Over the course of nearly four hundred years, the Atlantic slave trafficking system resulted in 12.5 million Africans forcibly taken from their continent to the Americas. A devastating 1.8 million of those individuals died during the Middle Passage, enduring scarcely imaginable conditions of overcrowding, squalor, and disease. Some took their own lives by leaping overboard, while still more were callously thrown into the sea.

Two Interwoven Narratives

In The Zorg, author Siddharth Kara weaves together two interconnected 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 explores how this atrocity played a pivotal role in the abolition 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 wrote one of the rare first-person narratives of the Middle Passage, describing it as “a scene of horror almost inconceivable”.

The Roots in Liverpool

The tale begins in Liverpool, a port city that at the peak of its economic power was responsible for 40% of Europe's slave trafficking. Financing slavery was a highly profitable venture for everyone from the wealthy to the common people. One such entrepreneur, William Gregson, saved up his earnings from his trade, invested 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 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 standard rate in the acquisition of human beings.

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 departed the Netherlands. With Britain at war with the Dutch in late 1780, the Royal Navy granted British ships authority to seize Dutch ships at sea—a de facto sanctioning of 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 disgraced British governor named Robert Stubbs, who had been removed for corruption.

A Voyage into Hell

When Hanley arrived at Cape Coast Castle—a fortress with a notorious slave dungeon beneath it—he assumed control of the captured Zorg. He proceeded to grossly overload it with enslaved people, put 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 left Accra carrying 442 captives, 17 crew members, and one depraved passenger: the former governor, Robert Stubbs.

Kara excels in using historical documents to vividly reconstruct the general hell of being trafficked on a slave ship.

The Zorg's journey was plagued with disaster. "The flux" ravaged the vessel, followed by scurvy. The captain succumbed to sickness, became delirious, and handed command over to Stubbs. Thus, “a ship full of decay and death was being commanded by a passenger.” Kara masterfully utilizes eyewitness accounts to paint a picture of the sheer horror. The graphic testimony of Alexander Falconbridge, a ship's surgeon turned abolitionist, describes how the captives' skin was often worn down 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 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 did cover cargo discarded out of “necessity” for the ship's safety. Over several days, the crew drowned “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.

Insurance and Injustice

Back in Liverpool, investor William Gregson was dissatisfied with the financial return on his investment. He submitted an insurance claim for £30 per drowned captive—a substantial sum in today's money. The insurers refused to pay. In March 1783, Gregson took them to court 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.” 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, 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 reviewed in meticulous detail, exactly 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, made speeches, organized campaigns, 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.

An Enduring Impact

The debate over who or what deserves credit for abolition remains a matter of debate. The Zorg's legacy, however, is powerfully 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 prolonged mass campaign was unprecedented, serving as an testament to the power of moral courage, the pen, and relentless determination.

Kara's Narrative Method

Unlike his previous books—such as the Pulitzer finalist Cobalt Red—Kara has had to fill in certain lacunae in the available documentation. Consequently, imaginative flourishes sit awkwardly next to scrupulously factual accounts, giving the book a slightly chimeric feel. A blend of narrative suspense and part serious nonfiction, The Zorg ultimately succeeds in illuminating one of history's most horrific episodes, using compelling prose and meticulous research to assemble a portrait that haunts the reader long after the final page.