Compared to neighbouring Ghana, Ivory Coast, though practising slavery and slave raiding, suffered little from the slave trade. European slave and merchant ships preferred other areas along the coast. The earliest recorded European voyage to West Africa was made by the Portuguese in 1482. The first West African French settlement, Saint Louis, was founded in the mid-17th century in Senegal, while at about the same time, the Dutch ceded to the French a settlement at Gorée Island, off Dakar. A French mission was established in 1687 at Assinie near the border with the Gold Coast (now Ghana). The Europeans suppressed the local practice of slavery at this time and forbade the trade to their merchants.