The Library of Congress provides access to the Journal of the Senate of the United States of America, vol. 41, pp. 524-529 where the background is provided for amending the bill. S. 307 (31st Congress, 1st session) "A Bill Proposing to the State of Texas the establishment of her Northern and Western boundaries, the relinquishment by the said State of all territory claimed by her exterior to said boundaries, and of all her claims upon the United States" as amended, would result in the establishment of the Territory of New Mexico on September 9, 1850. The Territory of New Mexico included much of the land that now makes up the State of Arizona.