Speech of Mr. Clayton of Delaware, Delivered at the Whig Mass Meeting Held in Wilmington on the 15th of June, 1844., text, 1844; (https://texashistory.unt.edu/ark:/67531/metapth31257/m1/1/: accessed April 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .