Such were the main territorial divisions of New Spain during the concluding years of the Spanish government,--whilst the revolution was in progress,--and until the nineteen provinces of the empire of Iturbide were erected by the federal constitution of 1824 into the nineteen States of Chiapas, Chihuahua, Coahuila and Texas, Durango, Guanajuato, Mexico, Michoacan (Valladolid), New Leon, Oajaca, Puebla, Queretaro, San Luis Potosi, Sonora and Sinaloa, Tabasco, Tamaulipas, Vera Cruz, Jalisco (_Guadalajara_,) Yucatan, and Zacatecas,--and the TERRITORIES of Old and New California, Colima, New Mexico, and Tlascala. In 1830 the State of Sinaloa and Sonora, separated into its natural divisions, since which each has been a distinct, independent State. In 1836, the revolution which destroyed this federal constitution, changed these STATES into DEPARTMENTS; by which name they were recognized until the month of May, 1847, when the old federal constitution of 1824, with some amendments, was reenacted, and the departments once more converted into states; whilst provision was made for the creation of the new _state of Guerrero_, to be composed of the districts of Acapulco, Chilapa, Tasco and Talpa, and the municipality of Coyucan--the three first of which pertain to the state of Mexico, the fourth to Puebla, and the fifth to Michoacan,--provided these three states gave their consent within three months from the 21st of May, 1847, at which period the act reforming the constitution of 1824 was passed. The war between Mexico and the United States was happily terminated by the treaty negotiated at the town of Guadalupe, by Mr. Trist, on the 2d of February, 1848; and, by this compact, the limit between our respective territories was greatly changed from that which had been fixed by the treaty with Spain in 1819. According to the convention of Mr. Trist, the boundary between the republics commences in the Gulf of Mexico, three leagues from land, opposite the mouth of the Rio Grande, otherwise called Rio Bravo del Norte, or opposite the mouth of its deepest branch, if it should have more than one branch emptying directly into the sea; from thence it passes up the middle of that river, following the deepest channel, when it has more than one, to the point where it strikes the southern boundary of New Mexico, thence, westerly, along the whole southern boundary of New Mexico, which runs north of the town of El Paso, to its western termination;--thence northward, along the western line of New Mexico, until it intersects the first branch of the river Gila, or, if it does not intersect any branch of that river, then to the point on the said line nearest to such branch, and then in a direct line to the same;--thence down the middle of the said branch and of said river, until it empties into the Rio Colorado;--thence across the Rio Colorado, following the division line between Upper and Lower California, to the Pacific Ocean.