Even worse, Great Britain was rewarded for its role in advancing the negotiations by the signing of a separate treaty in which its favorable commercial rights were renewed and by the signing of a convention in which Brazil agreed to abolish slave trade with Africa within four years.
A maiores disto, Gran Bretaña obtivo unha compensación polo seu papel no avance das negociacións asinando un tratado á marxe no que se renovaban os seus dereitos comerciais favorables e asinando ademais unha convención na que o Brasil acordaba abolir o tráfico de escravos con África nos seguintes catro anos.