FROM UTAH.—The mail train from Camp Scott brings full particulars from the Utah army down to the 5th inst. One of the most import-ant reports through private advices, is the rupture between Gov. CUMMINGS and Gen. JOHNSTON, or in other words, a collision between the civil and military power in the Territory. The writer in Camp Scott says, Gov. CUMMINGS "has under-taken to assume authority to control the move-ments of Gen. JOHNSTON'S command, in such a manner as would enable him, if his assumption were sustained, to dictate even the location of the military posts which this army is under orders from Gen. STOTT to establish. It is needless to say that no one doubts that Gen. JOHNSTON under-stands his own position relative to his Excellency, as well as his Excellency's position relative to the army, better perhaps than anybody else, and that no such assumption on the part of the Governor will be acknowledged for an instant. His wishes and opinions would undoubtedly be received with respectful deference, but by no means be followed by unquestionable obedience."
The subject is treated by the correspondent as one well understood with the army, who will in the main adhere to the orders of Gen. JOHNSTON. That a threatened state of demoralization should have so soon appeared in the leadership of the Mormon expedition, is certainly a lamentable state of things—even more threatening than Mormonism itself. Official letters have been sent to Washington, detailing the particulars of this defection, and we shall soon know to what extent its exists, and what disasters it portends. It will be deeply regretted if the blundering Administration at Washington has contributed to this state of demoralization, by indefinite or indefinable in-structions to either civil or military commander.