According to U.S. immigration records, the United Kingdom used up 43.9 per cent of its quota between 1925 and 1929; 22.6 per cent between 1930 and 1934; and a mere 4.4 per cent in the 1936/40 period. This left room, technically, for considerable emigration to the United States from the British colonies in the Caribbean. However, this never occurred or, to be more direct, was never allowed to happen. Through the issuance of visas, and the requirement of substantial bonds, the United States, with the tacit approval of the British metropolitan and colonial authorities, exercised an extremely tight control over the flow of British West Indians. The result was a sharp decline in the numbers of British West Indians entering the United States after 1925.

Cedric J. Robinson, Black Marxism_ The Making o…, loc. 2401