Bunce Island History
Twenty miles upriver from Freetown, on a slip of land barely 1,650 feet long and 350 feet wide, the ruins of one of the most consequential sites in Atlantic history sit largely undisturbed. Bunce Island, sometimes spelled Bance or Bence in old British ledgers, was a slave castle that operated for roughly 140 years and shipped tens of thousands of West Africans into bondage — many of them to the rice plantations of South Carolina and Georgia. To stand among its crumbling brick walls today, with the Sierra Leone River lapping at the shore and fish eagles circling overhead, is to feel the full weight of a history that connects Sierra Leone directly to the founding families of Charleston, the Gullah Geechee communities of the American Lowcountry, and the diaspora movements still unfolding today.
For travellers spending time in Freetown, Bunce Island is the single most important historical excursion you can make. It is also one of the most logistically rewarding, sitting just a boat ride across the estuary. This guide walks you through the island's full story — from its founding in the late 1600s through its abolition-era decline, its rediscovery by African American descendants, and what you'll actually see when you visit today.
The Founding of a Slave Castle, 1670s–1700s
Bunce Island's location was no accident. The Sierra Leone River — actually a deep estuary rather than a river — is one of the finest natural harbours on the entire West African coast. Ocean-going vessels could anchor in deep water close to shore, take on fresh provisions, and load human cargo without the hazards of surf landings that plagued other slaving stations. Bunce sits at the upstream limit of navigation for large ships, making it the perfect gathering point between European traders arriving from the Atlantic and African merchants bringing captives down from the interior along the Rokel and Port Loko rivers.
The first European fortification on the island was established around 1670 by the Gambia Adventurers, an English chartered company. The Royal African Company took over shortly after, and by the early 1700s Bunce had become one of the principal British slaving outposts in West Africa. The castle was attacked and rebuilt multiple times — French naval raids in 1704, 1779, and 1794 each left their mark — but it always rose again because the commerce was too lucrative to abandon.
From around 1750 onwards, Bunce Island operated under the partnership of Grant, Oswald & Company, a Scottish-led firm based in London. Richard Oswald, one of the company's principals, would later play a remarkable second act in history: he was the British negotiator who signed the 1783 Treaty of Paris ending the American Revolutionary War. The wealth Oswald accumulated from Bunce Island financed his rise into the highest circles of British political life.
The Rice Connection: Bunce Island and South Carolina
What makes Bunce Island distinctive among the dozens of slave castles that once dotted the West African coast is the specific destination of so many of its captives. Henry Laurens, a wealthy Charleston merchant who would later serve as President of the Continental Congress, was Grant, Oswald & Company's agent in South Carolina. Through this transatlantic partnership, Bunce Island became the primary supplier of enslaved people to the Carolina and Georgia rice plantations.
South Carolina planters specifically sought captives from the "Windward Coast" — the rice-growing regions of Sierra Leone, Guinea, and Liberia — because these were people who already understood the complex agricultural science of wet-rice cultivation. The fortunes of Charleston, Savannah, and Beaufort were built directly on this knowledge, taken without consent from the homelands of the Temne, Mende, Limba, Sherbro, and other Sierra Leonean peoples. Advertisements in 18th-century Charleston newspapers regularly announced shipments of "fine healthy slaves from the Rice Coast" arriving from Bunce Island.
This direct lineage is why, today, the Gullah Geechee people of the South Carolina and Georgia Sea Islands retain language, foodways, basketry traditions, and agricultural techniques that are unmistakably West African — and often specifically Sierra Leonean. Linguists have documented Mende and Vai words preserved in Gullah songs. Sweetgrass basket-weaving in Charleston is identical in technique to coiled basketry still practised in villages outside Freetown.
Life Inside the Castle
At its peak in the late 1700s, Bunce Island held perhaps 200 to 500 captives at any given time, plus a small permanent staff of European traders, accountants, and African labourers. The compound included a fortified Great House where the chief agent lived, separate male and female slave yards enclosed by high walls, a watchtower, gunpowder magazine, factory buildings for trade goods, and — chillingly — a two-hole golf course where European staff entertained visiting captains. Slaves carried the clubs.
Captives arrived bound and exhausted after journeys of weeks or months from the interior. They were inspected, branded, and held until enough had been accumulated to fill a ship — typically 250 to 400 people. The mortality rate before embarkation was substantial; many died of dysentery, malaria, or simple despair within the castle walls. A cemetery for European staff still exists on the island. The unmarked burial places of the African dead do not.
The voyage from Bunce Island to Charleston took roughly six to eight weeks. Survivors of the Middle Passage were sold at the Charleston wharves, often within sight of the same Sullivan's Island quarantine station that scholars have called "the Ellis Island of Black America." It is estimated that close to 40 percent of all enslaved Africans brought to the United States passed through Charleston, and a significant portion of those came from or through Bunce Island.
Abolition and the Castle's Final Decades
British involvement in the slave trade was formally outlawed in 1807, and the Royal Navy's West Africa Squadron began patrolling the coast to intercept slaving vessels. Bunce Island's owners pivoted briefly to "legitimate" commerce — timber, ivory, and camwood — but the business model was broken. The castle was sold in 1808 to John and Alexander Anderson, who continued trading in non-slave goods for a few more decades. By the 1840s, operations had ceased entirely. The buildings were abandoned to the rainforest.
The timing is poignant. Just downstream, the new colony of Freetown — founded in 1787 as a settlement for freed slaves from London, Nova Scotia, and Jamaica — was growing into a thriving abolitionist outpost. The Royal Navy's anti-slavery patrols brought tens of thousands of "recaptives" liberated from intercepted slave ships into Freetown, where they became the ancestors of today's Krio community. Within a single generation, the same estuary that had been the gateway to bondage became the gateway to freedom for a different group of Africans. If you want to understand this fuller picture, our Freetown history guides trace the founding of the colony in detail.
Rediscovery and the Diaspora Pilgrimage
For more than a century after abandonment, Bunce Island was effectively forgotten outside specialist circles. The ruins were swallowed by vegetation. Then, beginning in the 1970s, historians and African American researchers — most notably Joseph Opala, an American anthropologist who spent decades documenting the Sierra Leone–Gullah connection — began to piece together the island's true significance. Opala's work, alongside that of Sierra Leonean colleagues, transformed Bunce from a footnote into a major site of memory.
The emotional climax of this rediscovery came through a series of "homecomings." In 1989, a Gullah delegation led by Emory Campbell visited Sierra Leone, including Bunce Island, in what was filmed for the documentary Family Across the Sea. In 1997, Mary Moran, a Gullah elder from Georgia, travelled to Sierra Leone after a Mende song her family had preserved for 200 years was identified by scholars as a Mende funeral dirge — and she met women in a remote village who could still sing it. In 2005, actor Isaiah Washington made a documented genetic and cultural pilgrimage to Sierra Leone. These journeys turned Bunce Island into one of the most powerful diaspora heritage sites anywhere in Africa.
President Joseph Momoh designated Bunce Island a national historic site in 1989, and conservation efforts have accelerated since the end of Sierra Leone's civil war in 2002. The US-based Bunce Island Coalition, working with the Sierra Leone Monuments and Relics Commission, has stabilised several of the most endangered structures. UNESCO World Heritage nomination has been under discussion for years.
Visiting Bunce Island Today
Getting There
Bunce Island lies about 30 km upriver from central Freetown. There is no scheduled public ferry — every visit is arranged privately. Most travellers depart from Aberdeen, Government Wharf, or Pelican Water Taxi terminal in Freetown, with the boat journey taking between 45 minutes and 90 minutes depending on vessel and weather. Boats are open or semi-covered, and the river can be choppy in the wet season (June–September), so bring sun protection and a light waterproof.
A licensed guide is essential. Sierra Leone's Monuments and Relics Commission stations caretakers on the island who provide interpretation, and reputable Freetown tour operators bundle the boat, guide, and entry fee into a single day-trip package. Expect to pay between USD 80 and USD 200 per person depending on group size. For tips on choosing operators and combining excursions, see our Freetown day trip planner.
What You'll See
The site is intentionally minimally restored — the philosophy has been to stabilise rather than reconstruct, preserving the haunting quality of authentic ruins. Walking the island with a knowledgeable guide, you'll see:
- The fortified gateway and remnants of the defensive walls, including cannon still in position facing the river
- The Great House foundations, where the chief agent lived and conducted business
- The slave yards — separate enclosures for men and women, with the original brick walls partly intact
- The watchtower base and gunpowder magazine
- The European cemetery, with weathered headstones from the 1700s
- The "factory house" ruins where trade goods were stored
- Memorial plaques placed by visiting Gullah and diaspora delegations
A typical visit lasts two to three hours on the island itself. Many travellers describe it as one of the most moving experiences of their lives. Bring water, sturdy shoes, and time to sit quietly. The acoustics of the river and the wind through the kapok trees do a lot of the emotional work.
When to Go
The dry season (November to April) is the most comfortable time, with calm river conditions and minimal rain. Harmattan haze in December and January can soften the light beautifully for photography. The wet season is greener and dramatic but boat journeys can be rough and visits sometimes cancelled. If you're already planning a broader Sierra Leone trip, our
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