A dilapidated two-century-old building in Saint-Louis, Senegal bears testament to the island’s little-known past as part of the transatlantic slave trade, the traces of which are quickly and quietly disappearing from view. Located in the country’s north, between the Atlantic Ocean and the Senegal River, the island is rarely mentioned in the history of the slave trade, even though it was a hub through which tens of thousands of Africans passed.