Treaty with Mexico (1853)
The Mexican Republic agrees to designate the following as her true limits with the United States for the future: retaining the same dividing line between the two Californias as already defined and established, according to the 5th article of the treaty of Guadalupe Hidalgo, the limits between the two republics shall be as follows: Beginning in the Gulf of Mexico, three leagues from land, opposite the mouth of the Rio Grande, as provided in the 5th article of the treaty of Guadalupe Hidalgo; thence, as defined in the said article, up the middle of that river to the point where the parallel of 3I° 47' north latitude crosses the same; thence due west one hundred miles; thence south to the parallel of 3I° 20' north latitude; thence along the said parallel of 3I° 20' to the IIIth meridian of longitude west of Greenwich; thence in a straight line to a point on the Colorado River twenty English miles below the junction of the Gila and Colorado Rivers; thence up the middle of the said river Colorado until it intersects the present line between the United States and Mexico. . ..
In consideration of the foregoing stipulations, the Government of the United States agrees to pay to the government of Mexico, in the city of New York, the sum of ten millions of dollars . . .