"Art. 11. The United States undertakes to deliver up, if possible, any Mexicans that may be captured by any of the savage tribes within the ceded territory; and to prevent purchasing any property from any Mexican while in capture by the Indians; nor to purchase any property of any kind stolen within Mexican territory by such Indians.
"Art. 12. In consideration of the extension acquired by the boundaries of the United States, as defined by the fifth article of the present treaty, the Government of the United States engages to pay to that of the Mexican republic the sum of fifteen millions of dollars, and prescribes the manner and times of payment.
"Art. 13. The United States assumes the payment of all claims now due and those hereafter to become due by reason of claims already liquidated against Mexico under the treaties of April 11, 1839, and January 30, 1843.
"Art. 14. The United States discharges Mexico from all claims of citizens of the United States against said republic.
"Art. 15 provides for the appointment of a board of commissioners to adjudicate all claims against Mexico, the United States assuming the payment of such as may be allowed; the Mexican Government agreeing to furnish such books, papers, etc., as may be deemed necessary as evidence.
"Art. 16. The right of both parties to fortify any point in its territory it may deem proper.
"Art. 17. The treaty of April 5, 1831, and its provisions not inconsistent with this treaty, revived.
"Art. 18. All supplies for troops of the United States shall be exempt from duties or charges of any kind; the United States engaging to prevent merchandise and goods from being landed, under cover of this article, not intended for the army.
"Art. 19. General provisions in regard to merchandise imported into Mexico during hostilities.
"Art. 20 provides what disposition shall be made of merchandise arriving in Mexico, if the customhouses shall be delivered up less than sixty days from the signatures to this treaty.