INTERESTING FROM UTAH-
From the Baltimore American.
WASHINGTON, July 11 —Speaker Colfax, accompanied by Lieutenant Governor Bross, of Illinois, Richardson, of the New York Tribune, and others, have, of course, reached California by this time. They were at Salt Lake City on the 12th of June. Information received from these parties discloses a most extraordinary development of mineral wealth in the portions of the country through which they passed, surpassing all anticipation, and more the a fulfilling the predictions of Secretary Usher, when he received the specimens of silver, gold, cinnabar, quicksilver, &c., more than a year ago. In fact, in reading the speech of Mr. Colfax, at Salt Lake City, one would suppose that he was describing a celestial region, and the same impression is pro-duced by utterances of his companions. One of the speakers predicts that man now aged will live to witness the completion of the grandest of all national enter-prise—the Pacific railroad—and that boys who heard his voice that night would see the Pacific slope teeming with the busy life of hundreds of millions of people. Not the least of the wonders described is that of the great overland stage line, now extending through a desert of twelve hundred miles in extent. The coaches of this line abound in personal comforts, and are driven with rapidity and ease. in the course of the speech of Mr. Colfax, he distinctly told the Mormons that all attempts to destroy the Union had failed; that it was to-day stronger than ever; that treason would be punished with prompt and terrible death; and that the tide of emigration was coming, and would sweep away all their institutions, whether of slavery or polygamy, thus covering the whole of that region with the bless-ings of Christianity and morality. Another fact was proved—that the great arid wastes which have lain for years without water can be successfully irrigated. The speaker showed that the Indian races were unworthy of consideration or respect. They were loathsome, savage, dishonest, ungrateful, and cruel—obstacles in the way of progress—and would be swept off by the strong arm like so many wild beasts. His judgment of the inhuman tribes of that far-off country is confirmed by all travellers; and yet, while all these things are true, establishing not alone the fertility and unbounded wealth of that distant region, the power of the National Government, tied the prospect in of the completion of the Pacific railroad, the Mormons are proved; by all recent and former testimony, so be faithless, cruel, and full of treason. Outside of South Carolina we had no bitterer enemies than the Mormon leaders, and although, like conquered slaveholders, they profess to be friendly now, they are not to be trusted. The Daily Union Vidette, published at Salt Lake City, and conducted by a brave Union man, brands the whole crew, without fear, favor, or affection. These facts deserve to be known and recorded, at a period when the Government is girding up its loins to purge the whole land from every element or symptom of an attempt to disturb or interfere with its mighty progress.