The Utah Rebellion.-Says the Washington Union:
"There can be no doubt that Brigham Young is organizing a most formidable opposition to the authority of the federal government in Utah. The notion given out by his emissa-ries that he contemplates a removal in the spring to the British or some other possessions is a ruse; the advices from all the sources over which he has no control being, that the Mormons from all portions of our vast west-ern domain are abandonding their settlements, sacrificing their property, purchasing im-mense stores of arms and ammunition, and concentrating together in the Salt Lake val-ley. Thoroughly provided and armed-equal naturally and physically to our men in military prowess-desperate and fanatical in the last degree-occupying a natural fortress almost impregnable by its topographical con-formation as well as by its vast distance from the source of assault-and reinforced by man-ifold alliance with warlike tribes of Indians-the necessity of early and adequate reinforce-ments from Congress to our army operating against them is apparent and imminent."
It is presumed, as the above has been pub-lished in the Union since the receipt of the despatches from the army, which the Secreta-ry of War declines to make public, that the information given was derived from those despatches.