Mormonism. — A late letter from Nauvoo states that the Mormons are in great trouble. The twelve apostles will not countenance the claims of Sidney Rigdon, and he in return threatens a full exposure of their proceedings. The letter says: “Sidney Rigdon professes to have had a vision, in which it was shown him all that would transpire to the winding-up scene. He says he has received the Keys of David, spoken of in the third chapter of the Revelations, which shutteth and no man openeth, and openeth and no man shutteth. It has been shown to him that the temple will not be finished, and in less than four years, there will be bloodshed; about this time the saints will fight the first great battle in Chambersburg, in Pennsylvania—the second at Harrisburg—3rd at Philadelphia—4th at Baltimore—5th at Washington—6th at Richmond—7th at New York—8th at Boston—9th at Hudson—10th and last on this continent, at Monmouth, N.J., in which they will defeat the forces of Queen Victoria—take the shipping that brought over her army, and pass over in divisions to England, France, and Spain, and finally complete the conquest of the whole world. They will fight the battle of Gog and Magog at Jerusalem, where the Savior will appear, which will be in about eleven years from this time. Sidney says he now has all the keys that were once held by Joseph. He has already ordained several prophets, who are instructed to preach and foretell these events, but that a sign will be given to them when to leave, so that they may assemble and take command of the army. Several have joined him, among whom is Brother Fergus. He says he has had a testimony from God that Sidney’s visions are true. Emma and President Marks are in favor of Sidney, but he is opposed by the twelve. It has caused a great deal of stir, and everybody is talking about it."

On September 9th, Sidney Rigdon was excommunicated, notwithstanding his wonderful revelations.