In the British West Indian islands (and also in the southern continental colonies that were to become states of the United States of America), the majority of enslaved blacks brought across the Atlantic came from West Africa (roughly between modern Senegal and Ghana). By contrast, very little of Bermuda's original black emigration came (directly or indirectly) from this area. The first blacks to arrive in Bermuda in any numbers were free blacks who came in the mid-seventeenth century from Spanish-speaking areas of the West Indies, and most of the remainder were recently enslaved Africans captured from the Spanish and Portuguese. As Spain and Portugal sourced most of their slaves from South-West Africa (the Portuguese through ports in modern-day Angola; the Spanish purchased most of their African slaves from Portuguese traders, and from Arabs whose slave trading was centred in Zanzibar).