A duel was fought at Vienna, S.C. on the 27th of September, in which Mr. Smyth, one of the editors of the Augusta Constitutionalist, was wounded by a ball through the thigh from the pistol of his antagonist, Dr. Thomas of Augusta. The meeting grew out of a newspaper controversy, Smyth taking offense at an article in the Chronicle of which Thomas avowed himself the author.—Another duel, with a still more serious result took place in Brownsville, Texas, on the 8th. The parties were Mr. W.H. Harrison and Mr. W.G. Clarke, who met in the street with five-barreled pistols. Clarke fell at the second fire, receiving his antagonist's ball near the heart.—Mr. W. Laughlin, an alderman in the city of New Orleans, and a very respectable and influential citizen, was killed by William Silk, another alderman, on the 29th of September: the affray grew out of political differences.

The great Railroad Conspiracy trials at Detroit terminated on the 25th of September, by a verdict of guilty against twelve of the prisoners and acquitting the rest. Two of them were sentenced to the State Prison for ten years, six for eight years, and four for five years.

Father Mathew has returned from his visit to the Western States, and has been spending a few weeks in New York. Some of the most influential gentlemen of New York city have appealed to the public for contributions to form a fund of twenty-five or thirty thousand dollars for his aid: it is seconded by a very strong letter from Mr. CLAY. Father Mathew is soon to leave the United States for Ireland.

A number of the literary gentlemen of New York have taken steps to render some fitting tribute to the memory of the late James Fenimore Cooper. A preliminary meeting was held at the City Hall, at which Washington Irving presided, and a committee was appointed to consider what measures will be most appropriate. The delivery of a eulogium and the erection of a statue are suggested as likely to be fixed upon. At a meeting of the New York Historical Society, held on the 7th of October, resolutions upon the subject were adopted.

The Episcopal Convention of the New York diocese was held on the 24th of September, and the Rev. Dr. Creighton, of Tarrytown, was elected, after a protracted canvass, Provisional Bishop. He is a native of New York, graduated at Columbia College in 1812, and has officiated at Grace Church and St Mark's Church, in New York.

From California our intelligence is to the 6th of September. San Francisco and Sacramento have been the scenes of great excitement. The self-appointed Vigilance Committee, which was organized to supervise, and, if it should be deemed necessary, to supersede the criminal courts, has given terrible proofs of its energy. Two men named Whittaker and McKenzie were in prison at San Francisco awaiting their trial. Fearing that justice might not be done them, the Vigilance Committee broke in the prison doors, took the men out during divine service on Sunday, and hung them both in front of the building. An immense crowd of people was present, approving and encouraging the proceedings. The regular authorities made very slight resistance to the mob. At Sacramento three men had been convicted of highway robbery and sentenced to be hung. One of them, named Robinson, was respited by the Governor, for a month. The day for executing the sentence of the law upon the other two arrived. A large concourse of people was present. The sheriff ordered the two men, Gibson and Thompson, to the place of execution, and directed Robinson to be taken to a prison-ship in which he could be secured. The crowd, however, refused to allow this, but retained him in custody. The two men were then executed by the sheriff, who immediately left the ground. Robinson was then brought forward and, after proper religious exercises, was hung. These occurrences created a good deal of excitement in California at the time, but it soon subsided. It seems to have been universally conceded that the men deserved their fate, and that only justice had been attained, although by irregular means.

The news from the mines continues to be encouraging. The companies were all doing well, and extensive operations were in progress to work the gold-bearing quartz. The steamer Lafayette was burned on the 9th, at Chagres. Marysville, in California, was visited on the night of August 30th, by a very destructive fire. The steamer Fawn burst her boiler near Sacramento on the 28th of August; five or six persons were killed.

From New Mexico we have news to the end of September. Colonel Sumner's expedition against the Navajo Indians had reached Cyrality, in the very heart of the Indian country, and intended to erect a fort there. The Indians were swarming on his rear, threatening hostilities. News had reached Santa Fé that five of Colonel Sumner's men had perished for want of water, before reaching Laguna. The troops were scattered along the road for forty miles, and horses were daily giving out. Colonel Sumner will establish a post at St. Juan, one in the Navajo country, and one at Don Ana.

Quite an excitement had been raised at Santa Fé by the demand of the Catholic Bishop for the church edifice commonly known as the Military Church. Under the Mexican Government it was used exclusively as the chapel of the army. Since the conquest it had been used by the United States army as an ordnance house. After the departure of the troops, Chief Justice Baker obtained from Col. Brooks permission to occupy the house as a court room. The Catholic clergy considered this as a desecration of the house, and consequently objected to its being thus appropriated. The commotion was quelled by the Governor's surrendering the key to the Bishop, formally putting the possession of the building into the hands of the Church.—Major Weightman is certain to be elected delegate to Congress.—Much misunderstanding exists between the Judges in construing the laws in regard to holding the courts, and some fear a good deal of delay in administering justice in consequence, as the lawyers are refusing to bring suits until there shall be unanimity among the Judges.—The difficulty between Mr. Bartlett and Colonel Graham, of the Boundary Commission, is still unsettled. The former was progressing with the survey.

Rain had fallen to some extent throughout New Mexico, and vegetation was consequently beginning to revive.