"Act of ngày 2 tháng 3 năm 1819, ch. 49". Statutes at Large. Acts of the Fifteenth Congress of the United States, 2nd Session. pg. 493–496. From Library of Congress, A Century of Lawmaking for a New Nation: U.S. Congressional Documents and Debates, 1774–1875. (accessed 2007-06-16). This act of Congress established the territory of "Arkansaw".
"Act of ngày 21 tháng 4 năm 1820, ch. 48". Statutes at Large. Acts of the Sixteenth Congress of the United States, 1st Session. pg. 565. From Library of Congress, A Century of Lawmaking for a New Nation: U.S. Congressional Documents and Debates, 1774–1875. (accessed 2007-06-16). This act of Congress modifies the act of ngày 2 tháng 3 năm 1819, and refers to the territory of "Arkansas". Thereafter, federal statutes describe it as the territory of Arkansas, although journals of both the House and Senate both continue to occasionally use "Arkansaw".
