SINCE our late article on Salt Lake, events have advanced. Judge McKean’s court has begun another session, and his former measures (narrated by us) have prepared the way for a new and momentous development. The displacement of the Mormon Territorial Marshal and Attorney-General, by the United States Marshal and Attorney-General for the Territory, had made it possible to obtain impartial juries. In “arraying” the jury of the present session, fidelity to the laws of the United States has been justly demanded as a qualification. All Mormons, then, who defy the law against polygamy have been set aside; the result is an entirely Gentile jury. Even Young’s editor of the Mormon newspaper (Deseret News) has been denied a seat among the jurors. The court has thus thrown a stunning thunderbolt into Mormondom, and the excitement in the Territory is said to be intense. The Mormons have at last learned that “Uncle Sam” is really on the soil, with a firm foot—that public justice, with the law in hand, sits enthroned in the court. It is reported that the jury have indicted Young and fourteen of his wives. If this is true, events will culminate quickly, and Brigham and his fellow-libertines will have to fight, flee, or succumb by putting away their concubines. There can be little fear of the first contingency. It would be too desperate. The United States troops are at Fort Douglas, in sight of the city. Their guns have thrown balls sheer over it, to a safe distance beyond. The Mormons know, therefore, that balls can be sent through it. Moreover, there is now ready access to the troops at stations along the great railroad. And then there is a formidable Gentile population on the spot, who have long been shocked by the vices of the “Saints,” and wish for a thorough purgation of the city. Still farther, there is a mighty army of miners in all the mountains that look down upon the valley. Scientific gentlemen, who are connected with the mining enterprises, told us that about twenty thousand of these stalwart men are now in the Territory, and thousands of them within easy reach of the city. These hardy men curse terribly the Mormon system. They have introduced, as we lately said, “free discussion” in the streets, and have utterly “dumfounded” the Mormon spies who, down to within a year or two, made it dangerous to speak above a whisper against the Church. They come down from the mountains, in hosts, to spend Saturday and Sunday in the city, and are free as their mountain winds in discussing the imposture and iniquities of Brigham Young and his fellow-leaders. Bad as these miners may be in some respects, they have had mothers, and many of them have wives and daughters at home, and they denounce the “mystery of iniquity” which everywhere stares them in the face, in the social system here. And well they may. They see enriched leaders, sanctimonious in aspect, with harems of from five to twenty-five wives so-called—a system of religious debauchery by which hundreds of legitimate wives and their children are depressed and degraded beyond endurance—women whose saddened faces show that they are consciously wrecked for life—a system of commingled depravity such as might well appall a Turk—of bigamy, adultery, and incest, sustained by so-called “Saints,” some of whom have two or more “sisters” for wives—some even mothers and their daughters. We speak of what we know. We have learned our facts (many of which we cannot record) from Mormons themselves. We have conversed, in their homes, with “first wives” who refuse to live with their polygamous husbands, and their sad stories have wrung our very heart and extorted our tears. Such facts indeed are universally known here, and we may well excuse the denunciatory wrath of the sturdy miners as they now defiantly stride these streets on Saturdays and Sundays. Moreover, these miners have old accounts to settle with Young and his associate leaders. The latter knew of the neighboring mines years since, but it was their shrewd policy to keep the secret, for if once discovered, tens of thousands of Gentiles would pour into the country, and Americanize, that is to say, civilize the region. Small groups ever and anon came into the mountains “prospecting,” but they strangely disappeared. The Mormon papers reported that they were frozen to death, though frequently at very unseasonable times. They came at last in companies large enough to defend themselves, and sent word down to Young and his associates, that, whereas their brother-miners had so often frozen to death in the neighborhood, it must be understood that for every miner thereafter thus frozen, a Mormon must freeze also. This ended the peril, but not the account. Now, these hard, brave men, with all their faults, are rigorous observers of law among themselves. Away from the established tribunals, they make their own laws in the mountains, and appoint their own judges, juries, and executioners. Scientific men among the mines assure us that nowhere else in the nation are mutual rights more sacred than among these mountaineers. They are content, therefore, with discussing Mormonism in the city, and with clinched fists swearing it to the nethermost parts; but any observer can see that a suitable provocation from Young would rouse them to the most summary measures. They would be likely to lay flat his thick adobe walls, and give him and his polygamous bishops and apostles the honors of prompt martyrdom. This possibility is the great danger of the revolution now in progress. It might complicate and retard the latter greatly. It needs the watchful care of the United States authorities. The latter must satisfy the miners and other Gentiles that they are doing their whole duty, if they would avert violence; but if, in the course of their legal proceedings, the Mormons should attempt their old policy of violence, then let the authorities summon the mountaineers to co-operate with the troops, and Brigham Young’s domination will be wiped out in twenty-four hours. Meanwhile, directly evangelical agencies are at work in the valley, and the territory generally, of which we shall speak hereafter. —The Methodist.