Whereas, pursuant to the first article of the treaty between the United
States and the Mexican Republic of the 30th day of December, 1853, the
true limits between the territories of the contracting parties were
declared to be as follows:
Retaining the same dividing line between the two Californias as already
defined and established according to the fifth article of the treaty of
Guadalupe Hidalgo, the limits between the two Republics shall be as
follows:
Beginning in the Gulf of Mexico 3 leagues from land, opposite the mouth
of the Rio Grande, as provided in the fifth 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 31° 47' north latitude
crosses the same; thence due west 100 miles; thence south to the
parallel of 31° 20' north latitude; thence along the said parallel of
31° 20' to the one hundred and eleventh meridian of longitude west of
Greenwich; thence in a straight line to a point on the Colorado River 20
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.
And whereas the said dividing line has been surveyed, marked out, and
established by the respective commissioners of the contracting parties,
pursuant to the same article of the said treaty:
Now, therefore, be it known that I, Franklin Pierce, President of the
United States of America, do hereby declare to all whom it may concern
that the line aforesaid shall be held and considered as the boundary
between the United States and the Mexican Republic and shall be
respected as such by the United States and the citizens thereof.
In testimony whereof I have caused the seal of the United States to be
hereunto affixed.
[SEAL.]
Given under my hand, at the city of Washington, this 2d day of June,
A.D. 1856, and of the Independence of the United States the eightieth.