DEAR SIR--On my return to this city, after a few weeks' absence in the interior of the Territory, I received your letter of the 25th ultimo, in which you give a short account of the sufferings of the _people called Mormons_, and ask "whether they could be permitted to purchase lands, and settle upon them, in the Territory of Iowa, and there worship Almighty God according to the dictates of their own consciences, secure from oppression," etc. In answer to your inquiry, I would say, that I know of no authority that can constitutionally deprive them of this right. They are citizens of the United States, and are entitled to all the rights and privileges of other citizens. The 2nd section of the 4th Article of the Constitution of the United States (which all are solemnly bound to support), declares that the "citizens of each State shall be entitled to all the privileges and immunities of citizens of the several States." This privilege extends in full force to the Territories of the United States. The first Amendment to the Constitution of the United States declares that "Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof." The Ordinance of Congress of the 13th July, 1787, for the government of the Territory northwest of the river Ohio, secures to the citizens of said Territory, and the citizens of the States thereafter to be formed therein, certain privileges which were, by the late Act of Congress organizing the Territory of Iowa, extended to the citizens of this Territory. The first fundamental Article in that Ordinance, which is declared to be forever unalterable, except by common consent, reads as follows, to-wit: "No person demeaning himself in a peaceable and orderly manner, shall ever be molested on account of his mode of worship, or religious sentiments in said Territory." These principles, I trust, will ever be adhered to in the Territory of Iowa. They make no distinction between religious sects. They extend equal privileges and protection to all; each must rest upon its own merits, and will prosper in proportion to the purity of its principles, and the fruit of holiness and piety produced thereby. With regard to the peculiar people mentioned in your letter, I know but little. They had a community in the northern part of Ohio for several years; and I have no recollection of ever having heard in that State of any complaints against them from violating the laws of the country. Their religious opinions, I consider, has nothing to do with our political transactions. They are citizens of the United States, and are entitled to the same political rights and legal protection that other citizens are entitled to. The foregoing are briefly my views on the subject of your inquiries.