The kernel of truth in these accounts is not easily separated from the chaff. The supposition that Burr seriously contemplated a separation of the Western States from the Union may be dismissed from consideration. The loyalty of the Mississippi Valley at this time is beyond question; and Burr was too keen an observer not to recognize the temper of the people with whom he sojourned. But there is reason to believe that he and his confederates may have planned an enterprise against Mexico, for such a project was quite to the taste of Westerners who hated Spain as ardently as they loved the Union. Circumstances favored a filibustering expedition. The President's bellicose message of December had prepared the people of the Mississippi Valley for war; the Spanish plotters had been expelled from Louisiana; Spanish forces had crossed the Sabine; American troops had been sent to repel them if need be; the South American revolutionist Miranda had sailed, with vessels fitted out in New York, to start a revolt against Spanish rule in Caracas; every revolutionist in New Orleans was on the qui vive. What better time could there be to launch a filibustering expedition against Mexico? If it succeeded and a republic were established, the American Government might be expected to recognize a fait accompli.
The success of Burr's plans, whatever they may have been, depended on his procuring funds; and it was doubtless the hope of extracting aid from Blennerhassett that drew him to the island in midsummer of 1806. Burr was accompanied by his daughter Theodosia and her husband, Joseph Alston, a wealthy South Carolina planter, who was either the dupe or the accomplice of Burr. Together they persuaded the credulous Irishman to purchase a tract of land on the Washita River in the heart of Louisiana, which would ultimately net him a profit of a million dollars when Louisiana became an independent state with Burr as ruler and England as protector. They even assured Blennerhassett that he should go as minister to England. He was so dazzled at the prospect that he not only made the initial payment for the lands, but advanced all his property for Burr's use on receiving a guaranty from Alston. Having landed his fish, Burr set off down the river to visit General Jackson at Nashville and to procure boats and supplies for his expedition.
