A treaty of cession was signed in 1823 and the island was formally named MacCarthy Island (after Sir Charles MacCarthy, former Governor General of the British West African Territories.)
En 1823 asinouse un tratado de cesión, e a illa pasou a chamarse formalmente MacCarthy Island (por Charles MacCarthy, antigo Xeneral Gobernador dos Territorios Británicos Africanos do Oeste.)