Salcedo informs virrey that 7000 american troops have been stationed in Natchitoches under general Wilkinson. Includes copy of letter from Cordero to Wilkinson warning that any troops crossing over Sabinas River will be considered hostile. Cordero petitions Salcedo for reinforcements as many soldiers protecting frontier have succumbed to fever. Reply from Wilkinson denies hostile intentions. Also includes correspondence from marques de Casa Yrujo of conspiracy between Burr, Wilkinson, and Baron de Bastrop to secede western U.s. states from the union, along with takeover of Florida and parts of New Spain. Details by Casa Yrujo on U.s. president's misleading account of affair as reported to american public. Burr's movements watched closely by informant in Philadelphia known as el gordo, who is suspected by Salcedo of being double agent. (A. Tukey, August 1988)