||PREFATORY. Upon the arrival on July 24, 1847-, of the Mormons in Salt Lake Valley, under the leadership of Brigham Young, they found it under the jurisdiction of the Republic of Mexico, and it so remained a part of that Republic until ceded to the United States by the treaty of Gaudalupe-Hidalgo on February 2, 1848. When the Mormons arrived they found no laws or people, except a lower order of American Indians, a few trappers and a wilderness of space. These Pioneers were governed until March 15, 1849, by the Ecclesiastical Laws of the Mormon Church and its Priesthood. On the 15th of March, 1849, the Mormon people met in convention and adopted the constitution of the provisional government of the State of Deseret. Thereafter, pursuant to said constitution, a General Assembly was elected by the people, consisting of a Senate and a House of Representatives. General assemblies convened in regular sessions. The first session convened July 2, 1849, under said constitution, and passed various laws for the government of the people until April 5, 1851, when it was finally dissolved and the provisional government of the State of Deseret was merged into that of the Territory of Utah. On the 27th day of February, 1851, Willard Richards, Secretary of the State of Deseret, published under his hand and seal a full compilation (known as the compilations of 1851) of all the laws of the State of Deseret. Of this compilation of the laws or ordinances of the State of Deseret -few copies were issued, and the ravages of time having destroyed almost all of the same, so there is not to exceed a dozen copies whose existence can be traced.