Soon after Hamilton's death, Burr left Washington on a journey to New Orleans, at that time a center of Spanish conspiring for possession of the lower Mississippi valley. Burr, unaware that Gen. James Wilkinson was in the pay of the Spanish, laid plans with him; what exactly Burr's aims were has never been made clear. Speculation ranges from the establishment of an independent republic in the American Southwest to seizure of territory in Spanish America.
With money secured from Harman Blennerhassett, Burr acquired the Bastrop grant on the Ouachita River in Louisiana to serve as a base of operations. In the autumn of 1806, he and a party of 60-odd colonists, well-armed and supplied, began the journey west from Blennerhassett Island. Burr's earlier trip to New Orleans had brought him under suspicion; now distrust became widespread. Wilkinson, in an effort to save himself, turned against Burr, and in dispatches to Washington accused Burr of treason.
Burr was arrested and tried for treason in the U.S. Circuit Court at Richmond, Va., Chief Justice John Marshall presiding, and found not guilty. Popular opinion nonetheless condemned him, and his remaining years were spent in private life. He was married in 1833 to the famous Madame Jumel (see Jumel Mansion); they were divorced in 1834.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.