The customs are a very important branch of revenue, and may be estimated to produce at Rio from five to six hundred thousand pounds sterling per annum, of which the English merchants pay upwards of three hundred thousand pounds, and that body collectively do not contribute upon the whole much less than six hundred and fifty thousand pounds sterling annually to the Brazilian customs: fifteen per cent. is paid by them upon all imports, (which by-the-bye is at present very unfairly levied, but more of that hereafter,) and certain duties upon produce exported, which does not appear to be at all equal at the different maritime towns. At Pernambuco fox instance, cotton pays six hundred reas per arobe. White sugar sixty reas per arobe, and brown sugar thirty reas, which, upon the average price of those articles when I left that city, was from six to ten per cent. And at Rio a duty of two per cent. at the market price was, in 1819, laid, generally, upon all produce exported. Coffee previously paid eighty reas per arobe, at a fixed price of two milreas and a half per arobe; and the price in 1819 being about four milreas and two hundred reas, the government collected the two per cent. upon the difference betwixt the two milreas and a half and the current value, which created some perplexity in levying the tax upon that article; and as eighty reas upon the fixed price is about two per cent. it would obviate this difficulty by repealing that law, and allowing the two per cent. to apply to the market price of coffee as well as other articles. The only advantage to be obtained by the government, by continuing this mode, would be in the event of coffee falling in value below two milreas and a half. The government retain the diamond district of Serro Frio under their own management, and it is extraordinary that, during the last fifty years, it has been so conducted, that this important branch of revenue has been unproductive, and the establishment is considered to be embarrassed. The company, who had it by contract some years previous to its reverting to the government, acquired considerable wealth, partly, however, by intrigue, as their engagement bound them to a fixed number of negroes, and by bribery they introduced a great many more to work the grounds, consisting of twelve or fourteen hundred square miles.