 Meanwhile, the Duke of Courland had lodged a protest against the seizure of his possessions in a time of peace.On 17 November 1664, after negotiations over the future of the territories, he relinquished in favour of Charles II all claims to his African possessions and in return was granted the island of Tobago and the right for himself to personally trade in the River Gambia.In 1667, the Royal Adventurers sublet their rights between Capes Blanco and Palmas to another body of adventurers, who became known as the Gambia Adventurers.