Postage to the Argentine Confederation, Paraguay and Uruguay, via England.
--After the 1st of January next, the postage upon letters sent from the U. States in the British mail via England to Buenos Ayres or any other part of the Argentine Confederation, to the Republic of Paraguay, and to Montevideo, or any other part of the Republic of Uruguay, will be increased to 45 cents for a half-ounce letter, prepayment required. This increased rate of postage results from the fact that the old rates of postage upon letters sent from the United Kingdom to any of the above-mentioned countries will be re-imposed by the British Office on and after the 1st of January, 1861.
