The Underground
Madagascar
December 31, 2025
10 minutes

St. Mary’s Island, Madagascar: The Lost Pirate Kingdom of the Indian Ocean

Discover St. Mary’s Island, Madagascar—the real-life pirate republic where legends like Henry Every, William Kidd, and La Buse ruled the Indian Ocean. Explore its lawless history, hidden treasures, and the rise and fall of the world’s most notorious pirate haven.

Photo: Weathered pirate graves at the historic cemetery on Île Sainte-Marie, Madagascar — the final resting place of buccaneers who sailed the Indian Ocean.

The Snapshot

Lying just off the east coast of Madagascar, Île Sainte-Marie (St. Mary’s Island) is a slender, tropical sanctuary that functioned as the de facto capital of Indian Ocean piracy during the late 17th and early 18th centuries. Known for its treacherous reefs and secluded bays, the island provided safe harbor for legendary outlaws like William Kidd and Henry Every, leaving behind a legacy cemented by the world’s only legitimate pirate cemetery.

The Humid Silence of Nosy Boraha

If the Golden Age of Piracy has a sound in the popular imagination, it is the roar of a cannon broadside in the Caribbean or the drunken cacophony of a Nassau tavern. It is loud, brash, and inextricably linked to the Atlantic. But if you travel to the other side of the world, to a sliver of land off the east coast of Madagascar, you will find that the true heart of pirate history is not loud at all. It is silent. It is a humid, heavy silence that smells of clove, vanilla, and wet rot.

This is Nosy Boraha, known to history as St. Mary’s Island. While the Caribbean was the minor leagues—a place of petty theft and Spanish skirmishes—St. Mary’s was the secret fortress of the "Pirate Round." This was the staging ground for the most ambitious criminal enterprise of the 17th century, a place where the targets were not merchant sloops but the treasure fleets of the Grand Mughal and the massive East Indiamen.

Here, the jungle is slowly consuming the evidence of human hubris. Roots wrap around the foundations of fortresses, and the tides of the Indian Ocean scour the bones of men who once held the world hostage. It is a place of archaeological melancholy, a tropical gothic masterpiece where the boundary between the myth of utopia and the reality of a brutal, sweltering death has been blurred by three centuries of cyclones. To walk here is to step into a graveyard of ambition.

The Cimetière des Pirates: Crossing the Mudflats

The pilgrimage into this dark history begins at the Cimetière des Pirates (Pirate Cemetery). It is not easily accessible, nor should it be. Located on a tidal islet south of the main harbor, the cemetery demands a specific ritual of approach. At high tide, it is an island of the dead, cut off from the living by dark, swirling water. To reach it, one must wait for the tide to recede, revealing a slick, treacherous causeway of mud and mangrove roots.

The walk across the mudflats is a sensory orientation to the reality of the pirate life. The air is thick with the scent of salt and stagnant water. Fiddler crabs scuttle into holes as you squelch toward the high ground. As you climb the small hill, the vegetation changes. Tall grasses and palms cast long, jagged shadows over the stones.

Unlike the sanitized, Disney-fied pirate graveyards of the West, this place feels forensic and raw. The stones are blackened by age and lichen. Many are illegible, their epitaphs erased by the relentless Malagasy rains. But the iconography remains. On one prominent grave, the legend is carved in stone: the Skull and Crossbones. It is not a prop; it is a warning and a badge of identity, chiseled by hand in the early 18th century. It is one of the few authentic, in-situ examples of pirate iconography in the world.

Standing among these graves, looking out over the bay where the ships once moored, one does not feel the romance of the high seas. One feels the immense isolation. These men died thousands of miles from home, buried in shallow graves on a rock at the edge of the known world, their bodies slowly dissolving into the red earth of Madagascar.

Beyond the Caribbean: The Shift to the East

To understand why St. Mary’s exists, one must understand the geopolitics of the late 1690s. The Caribbean was becoming a trap. The Royal Navy was tightening the noose around Jamaica and the Bahamas, and the pickings were becoming slim. The smart money—the "Old Hands"—looked East.

They initiated "The Pirate Round," a logistical feat that makes the Atlantic raids look like child's play. The route required sailing from New York or London, rounding the Cape of Good Hope, and establishing a base in Madagascar. From there, they could strike north into the Red Sea and the Persian Gulf.

The target was the Hajj pilgrimage fleet and the trade ships of the British East India Company. These vessels carried wealth that the Caribbean pirates could only dream of: silks, spices, ivory, and chests of gold and silver diamonds destined for the Mughal Emperor Aurangzeb. A single capture in the Indian Ocean could yield enough wealth to retire for ten lifetimes. But to hunt in these waters, they needed a sanctuary. They needed a place that was off the charts, defensible, and friendly to outlaws.

Adam Baldridge: The Architect of the Outpost

St. Mary’s did not become a pirate capital by accident; it was engineered. The architect of this criminal utopia was Adam Baldridge, a man who defies the stereotypical image of the swashbuckler. Baldridge was not a raider; he was a CEO. He was the kingpin and the fence, the man who understood that the real money was not in the fighting, but in the logistics.

Fleeing a murder charge in Jamaica, Baldridge arrived in St. Mary’s in 1691. He didn't just hide; he built. On a strategic hill overlooking the harbor, he constructed a stone fortress. Beneath it, he established a trading post that acted as the Amazon fulfillment center of the pirate world.

Baldridge created a sophisticated supply chain. He brokered deals with merchants in New York to send ships laden with rum, gunpowder, tools, and clothing to Madagascar. When the pirates returned from the Red Sea, their holds bursting with stolen Mughal treasures, Baldridge was there to buy their loot at a discount and sell them the supplies they desperately needed at a premium.

He ruled St. Mary’s like a feudal lord. He mediated disputes between pirate crews and the local Malagasy tribes. He organized the defenses. He even brokered the sale of slaves, turning St. Mary’s into a dark nexus of human trafficking. For nearly a decade, Adam Baldridge was the most powerful man in the Indian Ocean, the quiet architect sitting in his fortress while the world burned around him.

Ile aux Forbans: The Ghost Island

In the center of the bay, shielded by the main island, lies Ile aux Forbans (Pirates' Island). Today, it is a circular mound of green vegetation rising out of the calm water, silent and uninhabited. But if you squint against the tropical sun, you can almost see the forest of masts that once surrounded it.

This was the anchorage. At the height of the Pirate Round, dozens of ships would be moored here. It was a floating city of wood and canvas. The air would have been filled with the sounds of caulking hammers, the screech of violins, the brawling of drunken crews, and the languages of a dozen nations.

This is where the ships were careened—hauled onto the beach to scrape the barnacles and rot from their hulls. It was a vulnerable, laborious process that left the pirates exposed. Ile aux Forbans was their shield. The island is now a ghostly presence in the harbor. There are no ticket booths or guided tours on the islet itself, only the ruins of an old pier and the overwhelming sense of absence. It is a place where the energy of the past feels trapped in the landscape, unable to dissipate.

The Big Leagues: Hunting the Ganj-i-Sawai

The reputation of St. Mary’s was cemented by Henry Every, the "King of Pirates." In 1695, Every sailed from this harbor and executed the most profitable pirate raid in history. His target was the Ganj-i-Sawai (Gunsway), the treasure ship of the Grand Mughal.

The battle was brutal. The plunder was astronomical—estimated at £600,000 in 1695 currency (hundreds of millions today). When Every returned to the region, the wealth flowed through St. Mary’s. The raid caused a diplomatic crisis; the Mughal Emperor threatened to expel the East India Company from India, forcing the English government to launch the first true global manhunt.

This event marked the shift of St. Mary’s from a remote outpost to the center of the world’s attention. It proved that the Pirate Round was not a myth; it was a threat to the global economic order. The men who walked the beaches of St. Mary’s were not just thieves; they were insurgents against the empires of the world.

The Tragedy of Captain Kidd

No figure looms larger over St. Mary’s than Captain William Kidd. His story is the ultimate tragedy of the Pirate Round, and its physical remnants are still buried in the mud of the harbor.

Kidd arrived in St. Mary’s in 1698, not as a conquering hero, but as a broken man. He had set out as a privateer aimed at hunting pirates, but through a series of misfortunes and bad decisions, he had become one himself. His ship, the Adventure Galley, was a rotting wreck. Her hull was leaking so badly that they had to wrap it with cables to keep it from falling apart.

In the harbor of St. Mary’s, Kidd faced the ultimate humiliation. His crew, rich with plunder but disillusioned by Kidd’s leadership, mutinied. They deserted him to join the fleet of Robert Culliford, a pirate Kidd had been sworn to capture.

Alone and desperate, Kidd stripped the Adventure Galley of anything valuable and scuttled her. He burned the ship and let her sink into the shallow waters of the bay. He then sailed for New York in a smaller sloop to plead his case, a journey that would end at the hangman’s noose in London.

The Wreck of the Adventure Galley

For centuries, the Adventure Galley was a ghost story. Then, in roughly 2000, and again in subsequent expeditions, underwater explorer Barry Clifford and his team began to probe the silt of St. Mary’s harbor.

The archaeology of St. Mary’s is difficult. The water is murky, and the bottom is a thick, consuming mud. Yet, the team found it. They located the charred ribs of a vessel that matched the dimensions and location of Kidd’s ship. They found Ming porcelain shards and rum bottles, the debris of a floating life.

In 2015, the team pulled a 50kg silver ingot from the site, stamped with markings that some claimed linked it to Kidd. While the identification of the ingot sparked academic debate and controversy regarding UNESCO protocols, the presence of the wreck itself is undeniable. Down there, in the dark water, lies the vessel of one of history’s most famous men. It is not in a museum case; it is in the mud, slowly returning to the elements. It serves as a potent reminder that even the most legendary vessels are ultimately just wood and iron, vulnerable to fire and time.

The Myth of Libertalia

St. Mary’s is also the spiritual home of "Libertalia," the legendary anarchist colony. According to A General History of the Pyrates (1724), a Captain Misson and a radical priest named Caraccioli founded a utopia in Madagascar. In Libertalia, there was no private property. Slavery was abolished. Men of all races and creeds were equal. They called themselves Liberi—the Free.

Did Libertalia exist? Historians generally agree it was a fabrication, likely penned by Daniel Defoe using the pseudonym Captain Johnson, to critique the social hierarchies of Europe. However, the myth was born from the reality of St. Mary’s.

This island was a melting pot. It was a place where escaped slaves, displaced sailors, and Malagasy warriors lived in a tenuous co-existence. It was a democracy of thieves, where captains were elected and quartermasters held the power of veto. While the gleaming city of Libertalia may have been fiction, the social experiment was real. It represents the "Thematic Anchor" of the island: the desperate human desire to believe that a better world can be built, even if it is built on blood and theft.

Life in the Margins: The Reality of the Settlement

Stripping away the romance, life on St. Mary’s was a grinding ordeal. The "Tropical Gothic" reality was one of intense heat and pervasive disease. Malaria and dysentery were the true captains of the island. For every pirate who returned to New York with a sack of diamonds, three died shivering in a hammock on Nosy Boraha.

The isolation was psychological as well as physical. These men were thousands of miles from the cultures they understood. To survive, they had to integrate. They took Malagasy wives and formed alliances with local kings. This integration created a new ethnic group: the Zana-Malata (children of the mulattoes).

The descendants of these unions became a powerful political class in eastern Madagascar. They were the living legacy of the Pirate Round, a unique cultural hybrid born from the collision of European outlaws and island tribalism. The blue eyes found occasionally among the local population today are often cited as the genetic echo of the pirate era.

The Betrayal: The End of the Era

The end of St. Mary’s came not with a bang, but with a whimper of treachery. By the early 1700s, the navies of the world were closing in. The British government offered a General Amnesty: a pardon for all crimes committed (except for Henry Every and William Kidd) if the pirates surrendered.

The brotherhood collapsed. Men who had sworn loyalty to each other scrambled to secure their own safety. Adam Baldridge, the architect, had already fled, allegedly selling some of his own pirate allies into slavery to secure his escape. The utopia disintegrated into paranoia. The "Kings" of Madagascar were reduced to fugitives hiding in the jungle, waiting for the sails of the Royal Navy or the knife of a rival.

The Journey: A Hard Road to Paradise

Visiting St. Mary’s today preserves the atmosphere of isolation because it is not easy to get there. It is not a cruise ship stop. It requires a commitment. The journey usually involves a small, rattling puddle-jumper plane from Antananarivo or a rough boat crossing from the mainland at Soanierana Ivongo.

This difficulty is the island's protector. There are no high-rise hotels casting shadows on the beach. The roads are often unpaved. The electricity can be sporadic. This lack of development keeps the "Skull Island" vibe intact. When you arrive, you feel as though you have truly traveled away from the modern world.

Relics in the Grass: Museums and Cannons

Near the entrance to the Pirate Cemetery, a small, humble museum acts as the custodian of the island's memory. It is not the Louvre. It is a collection of maps, rusted tools, and artifacts pulled from the bay.

But the most striking relics are outside. Scattered along the coastline and in the town of Ambodifotatra, you can find iron cannons. They are not mounted on plinths with plaques; they are often just sitting in the grass or half-buried in the sand.

Touching the rough, pitted surface of these cannons connects you to the violence of the past in a way that a glass display case never could. These guns were cast in Europe, hauled across the world, fired in anger, and abandoned in defeat. They are slowly oxidizing, weeping rust into the soil, dying the slow death of the forgotten.

Whales and Ghosts

In a profound irony, the waters that were once the hunting grounds for the most violent men on earth are now a sanctuary for gentle giants. Between July and September, the channel between St. Mary’s and Madagascar fills with Humpback Whales migrating from the Antarctic to breed.

Tourists now come for the whales, often unaware of the bones beneath their boats. The juxtaposition is jarring and beautiful. The water that once ran red with the blood of the Ganj-i-Sawai is now filled with the song of whales. It is a reminder of nature’s ability to heal and to reclaim. The whales breach and crash into the ocean, indifferent to the history of the "Silver Captain" or the dreams of Libertalia.

The Silence That Speaks

Ultimately, St. Mary’s Island is a meditation on silence. In the Caribbean, piracy has been commodified—turned into theme parks, movies, and cocktail names. But on Nosy Boraha, the pirates have been reclaimed by the earth.

There is a profound philosophical weight to this place. It forces a confrontation with the impermanence of legacy. Captain Kidd was one of the most famous men of his age; his name terrified empires. Yet, he left his ship to rot in the mud here, and he died at the end of a rope. Adam Baldridge built a kingdom, and now only the stones remain.

As you stand on the hill overlooking the bay, with the scent of vanilla in the air and the jungle pressing in from all sides, you realize that the silence is not empty. It speaks. It tells the story of men who tried to build a utopia at the edge of the world, and of the jungle that patiently waited to take it all back. The Pirate Round is over. The jungle has won.

Sources & References

  1. Rushby, Kevin. Hunting Pirate Heaven: In Search of the Lost Pirate Utopias of the Indian Ocean. Walker & Company, 2003. (Essential travel literature and historical investigation).
  2. Defoe, Daniel (Captain Charles Johnson). A General History of the Robberies and Murders of the most notorious Pyrates. 1724. (Primary source regarding Libertalia and biographies).
  3. Clifford, Barry. Return to Treasure Island and the Search for Captain Kidd. Perennial, 2004. (Archaeological account of the Adventure Galley).
  4. UNESCO World Heritage Centre. "Ile Sainte-Marie (Nosy Boraha) - Tentative List." (Details the historical significance and preservation status).
  5. The Guardian. "Captain Kidd's ship found off Madagascar, claims explorer." May 7, 2015. (News report on the silver ingot discovery).
  6. History Channel. The Pirate Island of St. Mary's. (Documentary resource regarding the forensic analysis of the cemetery).
  7. Konstam, Angus. Piracy: The Complete History. Osprey Publishing, 2008. (Academic context on the Pirate Round).
  8. Rediker, Marcus. Villains of All Nations: Atlantic Pirates in the Golden Age. Beacon Press, 2004. (Social history of pirate democracy).
  9. Bialuschewski, Arne. "Pirates, Slavers, and the Indigenous Population in Madagascar, c. 1690-1715." The International Journal of African Historical Studies, Vol. 38, No. 3 (2005). (Academic source on Adam Baldridge and slave trade).
  10. Menon, K.P.A. The Tradition of Indian Ocean Piracy. (Context on the Mughal ships and the Hajj pilgrimage targets).
  11. BBC News. "Madagascar's pirate graveyard." (Travel feature on the current state of the cemetery).
  12. Lonely Planet. "Ile Sainte Marie: The pirate island." (Travel logistics and modern context).
  13. Smithsonian Magazine. "The true story of the pirate round." (Historical overview).
  14. Archaeology Magazine. "Captain Kidd's Shipwreck." (Details on the underwater excavation challenges).
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Diego A.
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