Mr. Letcher, the American Minister, left for the United States, on the 26th, and reached New Orleans Feb. 4th. It was supposed that he brought the Tehuantepec treaty ratified with him. A revolt against the central government has occurred in Guanajuato, but it was soon put down by the troops. A number of the ringleaders in it have been executed. The Mexican Government has granted to a company styled Rubio, Barron, Garay, Torre & Co., the whole of the public lands in the State of Sonora, comprising one of the most valuable tracts in the whole country.

The Yucatan papers complain loudly of the encroachments of the English in fortifying Belize, and in otherwise interfering in the affairs of the Peninsula. The American Hydrographic Party was busily engaged in surveying the route across the Isthmus.

CENTRAL AMERICA.

From Nicaragua we have intelligence to the 13th of January. A rich placer of gold is said to have been discovered about eight miles from Realejo. The crops throughout the country have been seriously threatened by immense flocks of locusts. In consequence of the alarm created by this menaced destruction, the Government has thrown open all the ports of the country to the free admission of all kinds of grain. Don Jose Sacasa has been elected Director of Nicaragua—the term of the present incumbent expiring on the 1st of May. The difficulties between the Government of San Salvador and the British Charge, Mr. Frederick Chatfield, have led to the blockade by the latter, on behalf of his Government, of all the ports of San Salvador. Mr. Chatfield resorted to this extreme measure because the Government refused to comply with his demands, that they should countermand certain instructions they had given to their agents, and contradict, officially, certain statements concerning the British Government made in the public prints of San Salvador. The cause of this blockade was certainly somewhat singular; but the form of it was still more so; for by its terms, British vessels were excluded from its operation. Mr. Chatfield has also written a letter to the Minister for Foreign Affairs of Nicaragua, complaining of the unwillingness of that Government to negotiate with Great Britain, acting on behalf of the King of Mosquito, for a boundary between the territories of Mosquito and those of Nicaragua; and saying that, "as a proof of the conciliatory spirit of the British Government," it had determined to prescribe and maintain a certain boundary line, which is designated. He adds that the British government is still willing to treat on the subject, and urges the importance of "coming to a friendly understanding with the Mosquito government, since no canal, or any other improved mode of transit across the Isthmus, can well be established before the difficulty, raised by Nicaragua on this point, is put an end to." In a subsequent letter, enforcing the necessity of arranging the claims of a British house for damages, Mr. Chatfield makes a singular but evident allusion to the hopes entertained by the Government of Nicaragua of aid from the United States. He says that, "Whatever assurances Nicaragua may receive that the conduct of its Government, however irregular it may be toward another, will at all times find support from third parties, still the Government of Nicaragua must feel that no reliance should be placed on such assurances, as no foreign Government will compromise political and commercial interests on the behalf of a country whose rulers reject the ordinary means of settling matters open to dispute, by argument, and negotiation."

From Valparaiso we have intelligence to January 2d. The U.S. Corvette Vincennes had been at that port, and took the American Minister, Hon. Bailie Peyton, on a visit to the province of Conception. A very destructive fire had occurred at Valparaiso, at which property to the value of a quarter of a million of dollars was consumed. Congress met December 16th, in extra session. A law had been passed authorizing the Executive to reform the Custom-House regulations. A law is under discussion making an appropriation of $36,000 annually to the Pacific Steam Navy. By an existing law of the country, eight acres of land are given to each foreign colonist: a new law is proposed, largely increasing the grant. The sum of $2244 has been voted to afford temporary residences for a colony of German emigrants. These facts are important indications of the efforts made to invite foreigners into the country. Henri Herz, the pianist, was at Valparaiso on the 1st of January. On the 5th, there was an eruption of the volcano of Portillo, near Santiago.

GREAT BRITAIN.

It is decided that Parliament is to be opened by the Queen in person, on the 4th of February. Speculation is rife as to the course of Government upon the subject of the "Papal Aggressions," of which though there are many rumors, nothing authentic has transpired. The excitement upon this subject, though the mode of manifestation is changed, seems not to have died away. It occupies less space in the newspapers, and fewer public meetings are held; the discussion now being carried on in books and pamphlets, of which the last month has produced about one hundred, in addition to nearly two hundred before published. In the address of the English prelates to the Queen, which was noticed in our last Number, no mention was made of the Irish Church. The bishops of that country have taken the matter up, and have protested both to her Majesty and to their English brethren, against any proceedings which shall imply that the two branches of the Episcopal Church have separate rights and interests. The Church question, in various aspects, can not well fail of being the prominent one in the ensuing session of Parliament. A movement has been set on foot, by the High Church Party with a view to a convocation for the settlement of various questions in debate within the Church; at a public meeting for this object speeches marked by peculiar acrimony were made. Secessions to the Roman Church, among the higher classes and the clergy, are more frequent than at any former period.

The unwonted prospect of a surplus in the revenue, has occasioned propositions for the abolition of many of the most onerous and odious taxes. Among those spoken of are the window tax, the tax on paper, that on tea, and the malt tax. The paper tax seems to be the favorite of the press; but the probability is that the reduction will be made upon the window tax. The question threatens to be an embarrassing one for the Ministry, who will find it difficult to decide among so many conflicting claims.

The Austrian government has officially demanded that punishment should be inflicted upon those persons who committed the assault upon General Haynau. After a somewhat prolonged correspondence the British Home Secretary declined to make any inquiry into the matter, on the plea that "it could not be attended with any satisfactory result." The refusal of General Haynau to enter any complaint before the authorities is assigned as the ground for this conclusion. Prince Schwartzenberg, in his closing dispatch, hints that the Austrian government may consider it "befitting to exercise reciprocity with regard to British subjects who may happen to be in Austria."

In the colonies, the process of "annexation" goes on steadily. In India one or two extensive districts are in course of absorption. At the Cape of Good Hope, the Governor has deposed the most powerful of the Kaffir chiefs, and appointed a British officer to assume the control of his people. In Australia vehement opposition has sprung up against the transportation system; and there is reason to suppose that this outlet for the criminal population of Great Britain will soon be closed.