When the British Oil Rivers Protectorate was established in 1885, the political independence of the Delta States came to an end. The European invasion of African sovereignty, which in effect began in 1849 with the appointment of a British Consul, was complete. Since trade and politics were so intimately linked within these states, which had for so long guarded the middleman trade in the interior, the fortunes of the middleman chiefs were bound to be affected by such a major political change. The material which has emerged from my study of John Holt in relation to his Delta trade in the period 1880–1910, suggests, however, that the economic power of the chiefs (as opposed to the rulers) was by no means so quickly affected as has usually been suggested. The deposition of King Ja Ja of Opobo in 1887 symbolizes the end of the political power of the Delta rulers. His middleman chiefs were able, however, to maintain their control of the middleman organization of trade for a few years longer. Similarly, in each of the other rivers (with the exception of Brass), while the ruler lost his power, his hierarchy of middlemen retained control of internal commerce until almost the turn of the century.