In 1893, when the title Oil Rivers Protectorate was changed to that of Niger Coast Protectorate, a regular administration was established (subject to the Foreign Office in London) under Sir Claude Macdonald, who was succeeded as commissioner and consul-general in 1896 by Sir Ralph Moor (1860-1909).
These regulations differed from those applicable to the joint settlement, in that a general supervision over municipal affairs was vested in the French consul-general, his approval being made necessary to all votes, resolutions, &c., of the ratepayers before they could be enforced at law.
By a law of April 1906 the U.S. consular service was reorganized and graded, the office of consul-general being divided into seven classes, and that of consul into nine classes; and on June 27 an executive order was issued by President Roosevelt governing appointments and promotions.
The laborious task of putting these general indications into a practical shape fell to Sir Evelyn Baring ~Lord Cromer), who arrived as consul-general and diplomatic agent, in Sir Evelyn succession to Sir Edward Malet, in January 1884.
A consul-general can be promoted to a diplomatic post, and take with him to his higher office the practical experience a consul gains of the material interests of the country to which he belongs.