The Full Story
A captain threw 132 people overboard. Then claimed insurance.
In 1781, the slave ship Zong was running low on water. Captain Luke Collingwood made a calculation. Sick slaves who died naturally couldn't be claimed on insurance. But 'cargo' thrown overboard to save the ship? That was covered.
Over three days, 132 enslaved Africans were thrown into the Atlantic. Men, women, children. Some fought back. Ten jumped voluntarily rather than be thrown. The captain filed an insurance claim: cargo lost at sea.
A court case followed. Not for murder. For the insurance money. Just business.
Granville Sharp heard about the case. He was outraged. He tried to bring murder charges. He failed. The law saw slaves as property, not people.
But Sharp refused to be silent. He told everyone what happened. Pamphlets spread through London. Working people heard. Women heard. They couldn't believe their country allowed this.
Something changed. In thousands of hearts, horror became resolve. Meetings formed. Committees organized. Petitions began.
From one horror, a movement was born. It would take fifty years. Sugar boycotts. Millions of petition signatures. Until 1833, when slavery was finally abolished throughout the British Empire.
All because ordinary people heard about the Zong. And refused to look away.
Why This Matters
The Zong Massacre didn't end quietly. When ordinary British people learned what happened, their outrage sparked the abolitionist movement. They couldn't vote, but they could refuse to accept murder as business.
Key Facts
- ✓The Zong was a slave ship owned by the Gregson syndicate, based in Liverpool (Wikipedia, Britannica, London Museum)
- ✓The ship sailed from the coast of Africa on 6 September 1781 with 442 enslaved Africans and 17 crew (Wikipedia, BlackPast, Britannica)
- ✓Captain Luke Collingwood was a ship's surgeon commanding a vessel for the first and only time (Wikipedia, BlackPast, Aspects of History)
- ✓The crew made a catastrophic navigation error, mistaking Jamaica for Saint-Domingue (Haiti) and sailing past Jamaica on 27-28 November 1781 (Wikipedia, Britannica)
- ✓By the time of the massacre, approximately 60 enslaved people and 7 crew members had already died from disease (Wikipedia, BlackPast)
- ✓54 women and children were thrown overboard on 29 November 1781 (Wikipedia, Britannica)
- ✓42 men were thrown overboard on 1 December 1781 (Wikipedia, Britannica)
- ✓A further group (sources vary: 26-38) were thrown overboard in early December (Wikipedia, Britannica)
- ✓10 enslaved people jumped overboard voluntarily rather than be thrown (Wikipedia, Britannica)
- ⚠Total killed: sources give varying figures,132, 133, or up to 143 depending on counting method (whether voluntary jumpers and those who died of other causes are included). The figure "132" is used in the insurance claim itself and is defensible. Some sources say "more than 130." Defensible.
- ✓The owners (Gregson syndicate) filed an insurance claim for "lost cargo" at £30 per head (Wikipedia, Britannica, Insurance Museum)
- ✓The insurers refused to pay, leading to the court case Gregson v Gilbert (1783) (Wikipedia, Britannica)
- ✓The initial jury trial at the Guildhall in London on 6 March 1783 ruled in favour of the owners, the insurance claim was upheld (Wikipedia, Britannica, London Museum)
- ✓Lord Mansfield (Earl of Mansfield) presided over the case as Lord Chief Justice (Wikipedia, Britannica)
- ✓Lord Mansfield had presided over Somerset v Stewart (1772), the landmark case that established slavery had no basis in English law (Wikipedia, Britannica, Historic England)
- ✓On appeal, evidence emerged that rain had fallen before the final batch of killings, undermining the claim of water shortage (Wikipedia, Britannica)
- ✓Mansfield ordered a new trial; there is no record of this trial taking place, and it is believed the Gregson syndicate dropped the claim (Wikipedia, Britannica, Fortune)
- ✓Olaudah Equiano, a formerly enslaved man, informed Granville Sharp of the massacre on 19 March 1783 (Wikipedia, Britannica, Sky History)
- ✓Granville Sharp attempted to bring murder charges against the crew (Wikipedia, Britannica, London Museum)
- ✓The Solicitor General (John Lee) refused to prosecute, reportedly saying enslaved people were "goods and property" (Wikipedia, BlackPast, multiple secondary sources)
- ⚠The exact quote attributed to Solicitor General John Lee, "Blacks are goods and property; it is madness to accuse these well-serving honourable men of murder", appears in secondary sources but precise primary attribution is uncertain. The substance is well-documented: murder charges were refused on the grounds that enslaved people were property. Defensible.
- ✓No crew member or owner was ever prosecuted for the killings (Wikipedia, Britannica, London Museum)
- ✓Sharp wrote to the Lords Commissioners of the Admiralty, the Duke of Portland (Prime Minister), and newspapers demanding action (Wikipedia, Britannica)
- ✓The Society for Effecting the Abolition of the Slave Trade was founded on 22 May 1787 by twelve men, nine Quakers and three Anglicans including Granville Sharp and Thomas Clarkson (Wikipedia, Society article)
- ✓The Zong massacre and its publicity were cited as an influence on the formation of the Society (Wikipedia, Society article)
- ✓Thomas Clarkson gathered evidence through extensive travel to British slave ports (Wikipedia, Parliament.uk)
- ✓William Wilberforce presented abolition bills to Parliament beginning in 1789 (Wikipedia, Britannica, Parliament.uk)
- ✓Olaudah Equiano published his autobiography "The Interesting Narrative of the Life of Olaudah Equiano" in 1789, which became widely read (Wikipedia, Britannica)
- ✓The Slave Trade Act was passed in 1807 (Parliament.uk, Britannica)
- ✓The Slavery Abolition Act was passed in 1833, abolishing slavery across the British Empire (Parliament.uk, Britannica)
- ✓The Royal Navy's West Africa Squadron patrolled the Atlantic to enforce anti-slave-trade legislation from 1808 onwards (Wikipedia, West Africa Squadron, National Archives)
- ⚠"For fifty years", the West Africa Squadron operated from 1808 to the 1860s, approximately fifty years. Some sources extend this to 1867. "Fifty years" is defensible as a round figure.
- ⚠"Freed 150,000 people", the commonly cited figure for people freed by the West Africa Squadron is approximately 150,000. Some sources give slightly different numbers (e.g., 160,000). Defensible.
- ✓In 1791, Parliament prohibited insurance companies from reimbursing ship owners when enslaved Africans were thrown overboard, a direct legislative consequence of the Zong case (Wikipedia)