A calamitous fire took place at New Orleans, on the eighteenth of January, destroying the magnificent St. Charles Hotel, together with two churches and several other buildings. The total loss is about $500,000, less than half of which was covered by insurance. Jenny Lind arrived at New Orleans from Havana on the 8th of February. Her reception was in the highest degree enthusiastic. Her first concert took place on the 10th, the receipts therefrom amounting to $20,000. The first ticket was purchased for $240 by a New Orleans hatter, the fortunate drawer of Powers' Greek Slave in the Cincinnati Art Union.

Two more of the unfortunate Hungarian refugees have reached this city: Captain Eduard Becsey, who served during the war as adjutant to General Bern, and Lieutenant Aurel Kiring. Captain Becsey was taken prisoner by the Russians, and carried to Kiev, on the Dneiper, where he was detained a year. After being released, he made his way to the Mediterranean, and obtained a passage to New-York.

Our latest news from Eagle Harbor, the port of the mining region on Lake Superior, state that the propeller Independence, which had just taken on board her last cargo of copper for the season, was blown on shore by a heavy gale, and imbedded in the sand, where she must remain till Spring. The Napoleon had arrived from Saut St. Mary, with provisions and stores for the winter.

Texas papers of the thirty-first of January state that Judge Rollins, the United States Agent, had effected a treaty with the Indians, providing for a cessation of hostilities, and the restoration of all stolen property and prisoners. Lieuts. Smith and Mechler had completed a survey of the Rio Grande from its mouth to a point about four hundred and fifty miles above Camargo. They report that the river can be made navigable for boats of light draught to a short distance above Loredo for several months in the year. Col. Anderson, of the corps of Topographical Engineers has received orders to make a survey of the Brazos and Guadalupe rivers. A fight had occurred between Lieutenant King, with seven men, of the Texan volunteers, and a body of Indians, who were driving off a number of stolen horses. They were pursued for fifteen or twenty miles, when they abandoned the horses, and escaped with the loss of three or four of their number. The total vote on the Pierce Boundary Bill, as officially reported, is 9,250 ayes, 3,366 noes.

On the eighteenth of December the whole of the American Boundary Commission had arrived at Paso del Norte, with the exception of an ox-train carrying supplies. The military escort, under the command of Col. Craig, was encamped on the American side of the Rio del Norte, but was soon to start for the copper-mines near the headwaters of the Gila. The Mexican Commissioner, General Conde, with his escort, was quartered in the town of El Paso. Several conferences took place between the Commissioners before they could agree on the starting-point for the boundary, the existing maps being as inconsistent with the terms of the treaty of Guadalupe Hidalgo as with the topography of the country itself. The winter, throughout the valley of the Del Norte has been very severe. The thermometer fell to six degrees at El Paso on the sixth of December, and the Rio Grande was frozen over for the first time in the memory of the inhabitants.

The settlements of New Mexico are threatened with scarcity. On the tenth of January corn was selling at three dollars the bushel, and vegetables not to be had at any price. The appearance of the agents for taking the census of New-Mexico had occasioned great alarm among the pueblos or villages. They feared that the account of their property was taken by the Government for the purpose of extortion and seizure. The Apaches have committed no depredations of late, but the Navajoes have broken their treaty by stealing several thousand sheep from the settlements on the Rio del Norte.

In the Utah Territory the Mormons have temporarily settled the question of slavery, by leaving it to the choice of the slaves themselves. If the slave chooses to leave his master, there is no power to retain him; if he chooses to stay, no one is allowed to interfere.

Our news from California is to the first of January. The steamers Carolina and Columbus sailed from San Francisco on that day, with 330 passengers and about $1,500,000 in gold dust. Business was very dull, both in the ports and inland towns of California, and the trading communities among the mines. The immense shipments of goods which had arrived from the Atlantic States had produced a complete stagnation in the market, bringing many kinds of merchandise below cost prices. After the first showers of the rainy season, early in December, the miners withdrew to the dry diggings, when the rains ceased, and three or four weeks of clear and delightful weather left them without employment. The richest localities are very thickly populated, the miners having built themselves log-cabins and organized communities for the winter. On parts of Feather river, the American Fork, and the Mokelumne, Tuolumne, and Mariposa rivers, the diggings were still yielding a good return. New discoveries of rich veins of quartz-bearing gold continue to be made. A mine of silver ore, of a very rich quality, is reported to have been discovered in the neighborhood of Monterey. A company is being formed at that place for the purpose of working the mine upon an extensive scale. The Sacramento papers state that a large mine of lead, in an almost pure state, exists near Johnson's Ranche, about thirty miles from that city. The ore is represented to lie on the surface of the earth, in heavy masses, so that vast quantities could be obtained without sinking a shaft.

On the evening of December 14th another fire broke out in San Francisco, in a large zinc building owned by Cooke, Baker & Co. By the exertions of the firemen and the citizens the conflagration was subdued, after consuming this building and three or four others of less value. The large building belonging to the Pacific Mail Steamship Company was in the utmost danger, having been greatly scorched by the flames. The total loss by this fire was $75,000. The city, on the first of January, was fully prepared for the rainy season. By the enterprise of the inhabitants, upward of seven and a half miles of street had been graded and four miles planked, while capacious piers and wharves were built far out into the bay, so that vessels were enabled to load and unload without the use of lighters. The cholera had entirely disappeared, not only from San Francisco, but from all parts of California. Its ravages have been much lighter than was anticipated, a fact which speaks well for the health of the country.

The Pacific News contains some interesting statistics of the condition of San Francisco at the close of the year 1850. The population of the city is estimated at 35,000. One hundred and seven miles of street are already laid out, one quarter of which is built upon and occupied. The business streets are substantially built of brick or iron. In addition to seventeen large auction firms and eight express companies, the city boasts of ten first class hotels and seven daily papers. The amount of gold-dust regularly shipped and entered for exportation during the year 1850 was $30,000,000; the estimated amount taken away by passengers, $12,000,000. The amount of bullion received was $1,722,600. The number of vessels which arrived during the year was 1,743 bringing 35,333 male and 1,248 female passengers; the number of clearances amounts to 1,461 vessels, carrying away 26,593 male and eight female passengers. The total value of the merchandise received by foreign and domestic vessels during the year was between four and five millions of dollars. In addition to 14 steamers running regularly between San Francisco and Panama, and three on the Oregon route, there are 45 steamers and 270 other craft of various kinds on the bay and inland streams.