"Second, Should the Government of Mexico propose a renewal of such negotiations, it should be acceded to only upon distinct propositions from Mexico, not inconsistent with the demands made by this Government in reference to said grant.

"Third, That the Government of the United States stands committed to all its citizens to protect them in their rights abroad, as well as at home, within the sphere of its jurisdiction; and should Mexico, within a reasonable time, fail to reconsider her position concerning this grant, it will then become the duty of this Government to review all existing relations with that Republic, and to adopt such measures as will revive the honor of the country and the rights of its citizens."

In Louisiana a new Constitution has been prepared by a State Convention, which introduces several new features of importance into the fundamental law of that state. The right of suffrage and of eligibility to office has been considerably enlarged. Every free, white male citizen of the United States, over twenty-one years of age, who has resided in the State a year, and in the parish six months previous to the election, is a qualified voter; and every qualified voter is eligible to either branch of the Legislature. The Legislature is to hold annual sessions—elections being held biennially.—The Judges of the Supreme Court and of all the inferior courts are made elective;—the Supreme Court is to consist of a Chief Justice and four associates—their term of office to be ten years. The credit of the State may be pledged for corporations formed for the purpose of making internal improvements within the State, by subscriptions of Stock, or by loans to the extent of one-fifth of the capital. All Corporations with banking or discounting privileges are prohibited, as are all special laws for creating Corporations. Banking and discounting associations may be created either by general or special laws—but ample security must be required for the redemption of their notes in specie. The Constitution may be amended by the concurrence of two-thirds of the members elected to both Houses, and a ratification of the people at the next election, by a vote on every proposed amendment taken separately. The new Constitution is to be submitted to the vote of the people on the first Tuesday of November.

A dreadful steamboat catastrophe occurred on Lake Erie on the 19th of August. The steam-propeller Ogdensburgh ran into the steamer Atlantic, striking her just forward of the wheel-house, and injuring her so seriously that, after going a mile or two toward the shore, she sunk. The propeller, not understanding the full damage of the collision, and anxious for her own safety, did not go to the rescue of her passengers until half an hour after the accident. More than a hundred persons lost their lives, the greater portion of them being Norwegian emigrants huddled together on the forward deck, and unable, through their ignorance of English, to avail themselves of the means of safety suggested. Very conflicting statements in regard to the cause of the collision have been published;—the night was not very dark, both vessels had signal lights and a watch on deck. The matter is undergoing judicial investigation.——On the Hudson River still another accident occurred on the 4th of September. As the steamer Reindeer lay at the wharf at Bristol landing, about forty miles below Albany, one of her connection pipes burst, and twenty-seven persons, mainly those in the after-cabin, were killed—fifty more being considerably injured.——A National Convention of the Free-Soil party was held at Pittsburgh on the 11th of August, at which John P. Hale, of New Hampshire, was nominated for President, and George W. Julian, of Indiana, for Vice-President, as the candidates of that party.——A meeting of delegates is to be held at Macon, Georgia, on the 20th of October, for the purpose of calling an Agricultural Congress of the Slaveholding States—the chief objects of which are declared to be to develope the resources, combine the energies, and promote the prosperity of the Southern States, and to cultivate the aptitudes of the negro race for civilization; so that when slavery shall have fulfilled its mission, a system may be authorized which shall relieve the race from its servitude, without sinking it to the condition of the free negroes at the North and in the West Indies.

From California we have intelligence to the 1st of August. The intelligence is without any feature of special novelty. The mining prospects continue to be good, and very large amounts of gold continue to be procured. The whole amount shipped from California during the past year was over sixty-six millions of dollars. The miners in every section of the gold districts continue to receive abundant returns for their labor.——Every mail brings a deplorable list of casualties and crimes in various parts of the State, the details of which it is unnecessary here to repeat. Nearly all of the outrages occur in the more distant and thinly-settled sections of the country; and in most cases the perpetration of crime is followed by the speedy, and often the lawless infliction of chastisement.——The celebration of the Fourth of July at San Francisco was marked by the attendance in procession of a large body of Chinese, who bore richly-decorated banners, got up in the style of their own country. The Chinese continued to arrive in the country in great numbers, nearly four thousand having reached San Francisco within a fortnight. The hostility of the miners toward them was abating. The arrival of emigrants from all quarters continued to be very great, 22,000 having landed between June 1st and July 9th. Difficulties have arisen in the San Joaquin district between the American miners and a party of French and Spaniards, who were thought to have trespassed upon private rights: serious collisions were apprehended at one time, but a better state of feeling has been induced. It was currently reported that fresh movements were on foot for the conquest and annexation of Southern California.

In Oregon, it is stated, valuable coal-mines have been discovered near St. Helens, on the Columbia river. The vein has been opened, and promises to be very extensive;—it is about two and a half feet thick, and has been traced for half a mile. The coal is remarkably pure. Other mines have been discovered in the vicinity, but they have not yet been explored.——The agricultural prospects of the territory were very good. The population is stated at 20,000, and is said to be rapidly increasing. A special session of the Legislature had been called by Governor Gaines for July 29th. The gold mines in the Southern part of the territory continued to yield fair returns. Complaints are made by recently arrived emigrants of ill-treatment received at the hands of the Mormons during their passage through the Salt Lake country.

From the extreme North West—the British possessions near Lake Winnipeg—accounts of very disastrous floods have been received. The settlement established by the Earl of Selkirk in 1812, which had grown into considerable importance as a point from which supplies were furnished to the Fur Companies of that region, and which contained about ten thousand inhabitants, had been nearly destroyed by freshets in the Red River of the North, which began on the 5th of May, and reached their height about the 20th. Dwellings, crops, and nearly all the products of twenty-five years' labor have been swept away: the damage is estimated at about a million of dollars.

SOUTH AMERICA.

From the Argentine Republic we have intelligence of fresh political disturbances, indicating at least the temporary failure of the new and moderate system introduced by Urquiza after the defeat and expulsion of Rosas. The Convention from the several provinces summoned by Urquiza, met at San Nicholas—ten of the thirteen provinces being represented by their governors, and adopted a Constitution for the federation. It provided for abolishing the transit duties, and for the assembling of a Congress at Santa Fé, which was to consist of two delegates from each province, to be selected by the popular vote, to be untrammeled by instructions, and the minority to conform to the decision of the majority, without dissent or protest. In order to defray the national expenses, the provinces agreed to contribute in proportion to the product of their foreign Custom-houses, and that the permanent establishment of the duties shall be fixed by Congress. To secure the internal order and peace of the republic, the provinces engage to combine their efforts in preventing open hostilities or putting down armed insurrections, and the better to promote these objects, General Urquiza was recognized as General-in-chief of the armies of the Confederation, with the title of Provisional Director of the Argentine Confederation. In the Chambers of Buenos Ayres, very warm opposition was manifested to this Convention: bitter and violent debates took place, and the popular clamor became so high that the Governor Lopez resigned his office; whereupon General Urquiza dissolved the Chambers, and took the supreme power into his own hands. In a communication sent by his order to the British Chargé, he states that the anarchy into which the province was thrown, compelled him to take this step, and declares that he shall not extend the authority with which he is vested beyond the time and the measures necessary for the re-establishment of order in the province. He also issued a brief address to the Governors of the provinces of the Confederation, declaring that he should use the power they had conferred upon him in rendering effective the sovereign will of the nation, in repelling foreign aggressions, and in restraining the machinations of those who might seek to awaken the passions which had so often brought disaster upon them. He promised that, with their assistance, the Argentine people should be presented before the world constituted, organized, and happy. "My political programme," he adds, "which is founded on the principles of order, fraternity, and oblivion of all the past—and all the acts of my public life, are the guarantee that I give you of the promise which I have just made, and, with it you may rest assured, that when the National Congress has sanctioned the Constitution of the State, and the confederated communities have entered into the constitutional path, I will deliver up to it the deposit you have confided to me, with a tranquil conscience, and without fearing the verdict of public opinion, or the judgment of posterity." After the dissolution of the Chambers there were some symptoms of rebellion, but this proclamation restored order, and was well received. He ordered all the printing offices to be closed for a few days, and banished five of the leading opposition representatives from the country. The provisional government had been temporarily reinstalled: and in this position affairs were awaiting the meeting of Congress, which was to take place in August.——In Brazil, important steps have been taken toward commencing works of internal improvement. A company has been empowered to construct railways from Rio Janeiro to several towns in the interior, and an agreement is in progress between the Imperial Government and a private company for the regular navigation, by steamboats, of the Amazon. The public revenue of Brazil continued to increase. A project for granting government credit to aid in purchasing steamers to cruise against African slave-traders, was under discussion in the Chambers, with a fair prospect of its passage.——From Ecuador, we learn that the expedition planned and led by General Flores against Guyaquil, has been defeated and dispersed. The troops comprising it, consisting of Chilians and Americans, and numbering about nine hundred, deserted Flores, and went over to General Urbina, the President of Ecuador, to whom the six vessels of the expedition were also given up. General Flores himself escaped to Tumbez. From the partial narrative of an officer engaged in the expedition, which is the only account of it yet published, the army of Flores seems to have been singularly deficient in energy, discretion, and valor. One of the vessels was blown up on the 3d of July, by the discharge of a pistol by one of the men, who were drunk in the cabin: about thirty lives were lost by this casualty.——In Chili, Congress was in session at our latest date, July 1st. Bills were under discussion to levy a direct tax on all property in cities and towns for municipal purposes: subjecting all schools to the control of the parish priests; and providing for the maintenance of the clergy. The telegraph from Valparaiso to Lima was in operation, and another line was projected to Copiapo—which is at the head of the province whose silver deposits have yielded so abundantly of late: it is said that the export from that province for the year will amount to six millions of dollars. Coal, said to be very little inferior to the best English coal, is found at Talcahuana. Labor and the necessaries of life were very high at Valparaiso.——From Montevideo, accounts to the 5th of June, state that the ratification of the Brazilian treaties puts an end to all fear of another foreign war. The principal clauses of the Convention agreed upon are the abandonment of the line of frontier which the treaties of October, 1851, conceded to Brazil, and the cession of the right of free navigation on Lake Merim to the Oriental flag.