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the degree of latitude where it strikes the Rio Roxo of Eatchitoches, or Red river; then, following the course of the Rio Roxo westward, 10 the degree of longitude 100 west from London, and 3 from Washington; then, crossing the said Red river, and running thence by line due north, to the river Arkansas !; thence, following the course of the southern bank of the Arkansas. 10 it's source, in latitude 42 north; and thence, by that parallel of latitude, to the South sea; the whole being as laid down in Melish's map of the United States, published at Philadelphia inl- proved to the first of January, ISIS.- But, if the source of the Arkansas ri- yer shall be found to fall north or south of latitude 42, then the line shall run tram the said source due south or north, as the case may be, till it meets the said parallel of latitude 42; and thence. along the said parallel, to the South sea. All the islands in the Sabine, and the said Red and Arkansas rivers, throughout the course thus described, to belong to the United States, but the use ot the waters, and the navigation ot the Sabine to the sea, and of the said rivers Roxo and Arkansas, through out the extent of the said boundary on their respective banks, shall be com mon to the respective inhabitants of both nations.

 The two high contracting parties agree to cede and renounce ali their rights, claims, and pretensions to the territories described by the said line; that is to say; the United States hereby cede to his Catholic Majesty, and re. nounce forever, ali their rights, claims, and pretensions to the tcrritofies lying west and south of the above described line: and, in like manner, his Catholic Majesty cedes to the said United States all his rights, claims, and pretensions to any territories east and north of the said line; and for himself, his heirs, and successors, renounces all claim to the said territories forever.

 ARTICLE THIRD.

 T0 fix this line with more precision. and to place the landmarks which shall designate exactly the limits of both na- lions, each of the contracting parties shall appoint commissioner and sur veyor, who shall meet before the ter mlnation of one year from the date of the ratification of this treaty, at Match itoches, on the Red river, and proceed to run and mark the said line, from the mouth of the Sabine to the Red river. and from the Red river to the river Arkansas, and to ascertain the latitude of the source of the said river Arkan- sas, in conformity to what is agree up- on and stipulated, and the line of iaii- tude 42, to the South sea. They shall make out plans and keep journals of their proceedings; and the result agreed upon by them shall be considered as part of this treaty, and shall have the same force as it were inserted there in. The two Governments will amica- ply agree respecting the necessary ar ticles to be furnished 10 those persons, and also as to their respective escorts, should such be deemed necessary.

 ARTICLE FOURTH.

 The present treaty shall be ratified, and the notifications shall be exchang- ed at Washington, within the term of four months, or sooner if possible.

 In witness whereof, we, the respec- tive Plenipotentiaries have signed the same, and have hereunto affixed our respective seals.

 Done at Mexico, this twelfth day of January, in the year of our Lord one thousand eight hundred and twenty eight, in the ffty-second year of the h. dependence of the United States of America, and in the eighth of that of the United Mexican States.

 J. R. POINSETT. L. S.

 $. CAMACHO. L. $.

 I. V. FSTEVA r.. s.1