In the city of Querétaro on the twenty sixth of the month of May eighteen hundred and forty-eight at a conference between Their Excellencies Nathan Clifford and Ambrose H. Sevier Commissioners of the United States of America, with full powers from their Government to make to the Mexican Republic suitable explanations in regard to the amendments which the Senate and Government of the said United States have made in the treaty of peace, friendship, limits and definitive settlement between the two Republics, signed in Guadalupe Hidalgo, on the second day of February of the present year, and His Excellency Don Luis de la Rosa, Minister of Foreign Affairs of the Republic of Mexico, it was agreed, after adequate conversation respecting the changes alluded to, to record in the present protocol the following explanations which Their aforesaid Excellencies the Commissioners gave in the name of their Government and in fulfillment of the Commission conferred upon them near the Mexican Republic.
First. The American Government by suppressing, the IXth article of the Treaty of Guadalupe and the substituting of the III article of the Treaty of Louisiana did not intend to diminish in any way what was agreed upon by the aforesaid article IXth in favor of the inhabitants of the territories ceded by Mexico. Its understanding that all of that agreement is contained in the IIId article of the Treaty of Louisiana. In consequence, all the privileges and guarantees, civil, political and religions, which would have been possessed by the inhabitants of the ceded territories, if the IXth article of the Treaty had been retained, will be enjoyed by them without any difference under the article which has been substituted.
Second. The American Government, by suppressing the Xth article of the Treaty of Guadalupe did not in any way intend to annul the grants of lands made by Mexico in the ceded territories. These grants, notwithstanding the suppression of the article of the Treaty, preserve the legal value which they may posses; and the grantees may cause their legitimate titles to be acknowledged before the American tribunals.
Conformably to the law of the United States; legitimate titles to every description of poverty personal and real, existing in the ceded territories, are those which were legitimate titles under the Mexican law in California and New Mexico up to the 13th of May 1846, and in Texas up to the 2nd March 1836.
Third. The Government of the United States by suppressing the concluding paragraph of article XIIth of the Treaty, did not intend to deprive the Mexican Republic of the free and unrestrained faculty of ceding, conveying or transferring at any time (as it may judge best) the sum of the twelfe [sic] millions of dollars which the same Government of the United States is to deliver in the places designated by the amended article.
And these explanations having been accepted by the Minister of Foreign Affairs of the Mexican Republic, has declared in name of his Government that with the understanding conveyed by them, the same Government would proceed to ratify the Treaty of Guadalupe as modified by the Senate and Government of the United States. In testimony of which their Excellencies the aforesaid Commissioners and the Minister have signed and sealed in quintuplicate the present protocol.
[Seal] A. H. Sevier
[Seal] Nathan Clifford
[Seal] Luis de la Rosa
Source: The Treaty of Guadalupe Hidalgo: A Legacy of Conflict By Richard Griswold Del Castillo