Some time in the latter part of September I received intimations that designs were in agitation in the Western country unlawful and unfriendly to the peace of the Union, and that the prime mover in these was Aaron Burr, heretofore distinguished by the favor of his country.  The grounds of these intimations being inconclusive, the objects uncertain, and the fidelity of that country known to be firm, the only measure taken was to urge the informants to use their best endeavors to get further insight into the designs and proceedings of the suspected persons and to communicate them to me.

It was not till the latter part of October that the objects of the conspiracy began to be perceived, but still so blended and involved in mystery that nothing distinct could be singled out for pursuit.  In this state of uncertainty as to the crime contemplated, the acts done, and the legal course to be pursued, I thought it best to send to the scene where these things were principally in transaction a person in whose integrity, understanding, and discretion entire confidence could be reposed, with instructions to investigate the plots going on, to enter into conference (for which he had sufficient credentials) with the governors and all other officers, civil and military, and with their aid to do on the spot whatever should be necessary to discover the designs of the conspirators, arrest their means, bring their persons to punishment, and to call out the force of the country to suppress any unlawful enterprise in which it should be found they were engaged.  By this time it was known that many boats were under preparation, stores of provisions collecting, and an unusual number of suspicious characters in motion on the Ohio and its waters.  Besides dispatching the confidential agent to that quarter, orders were at the same time sent to the governors of the Orleans and Mississippi Territories and to the commanders of the land and naval forces there to be on their guard against surprise and in constant readiness to resist any enterprise which might be attempted on the vessels, posts, or other objects under their care; and on the 8th of November instructions were forwarded to General Wilkinson to hasten an accommodation with the Spanish commandant on the Sabine, and as soon as that was effected to fall back with his principal force to the hither bank of the Mississippi for the defense of the interesting points on that river.  By a letter received from that officer on the 25th of November, but dated October 21, we learnt that a confidential agent of Aaron Burr had been deputed to him with communications, partly written in cipher and partly oral, explaining his designs, exaggerating his resources, and making such offers of emolument and command to engage him and the army in his unlawful enterprise as he had flattered himself would be successful.  The General, with the honor of a soldier and fidelity of a good citizen, immediately dispatched a trusty officer to me with information of what had passed, proceeding to establish such an understanding with the Spanish commandant on the Sabine as permitted him to withdraw his force across the Mississippi and to enter on measures for opposing the projected enterprise.