Hardcastle, E. L. F. (Edmund Lafayette), 1824-1899 . Battles of Mexico : line of operations of the U.S. Army under the command of Major General Winfield Scott on the 19th and 20th of August, 1847. Philadelphia, Pennsylvania. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc29454/. Accessed May 25, 2013.