 This gave rise to discontent, and, to check an eventual rebellion, the government ordered all the inhabitants to surrender their arms.Furthermore, a stone fortress, Fort Adelaide, was built on a hill (now known as the Citadel hill) in the centre of Port Louis to quell any uprising.Slavery was abolished in 1835, and the planters ultimately received two million pounds sterling in compensation for the loss of their slaves, who had been imported from Africa and Madagascar during the French occupation.