The mad scheme grew daily. Burr's plan was suddenly to seize both President and Vice-President. Then having the heads of government in his power he would next lay hands on the public money and the navy. He would take what ships he wanted, burn the rest, and, sailing to New Orleans, he would proclaim his empire. But Burr dare not let every one know his real intentions, and so he gave out that he meant to lead an expedition against Mexico.

As time went on hundreds of people knew of his conspiracy. It was talked of everywhere. But Jefferson paid no heed. He did not believe that Burr meant any treason against the Union. So the conspirators went on building boats, and arming men, undisturbed.

But things did not go so smoothly as Burr had hoped. He had expected to get help from Britain, and he got none. He had expected help from Spain, and he got none. Still he went on with his scheming. He had even written out his Declaration of Independence it was said, when suddenly the end came. One of Burr's friends betrayed him and at length President Jefferson woke up to what was going on.

At once he issued a proclamation declaring that a conspiracy against Spain was being carried on, and commanding all officers of the United States to seize the persons engaged in the plot. No name was mentioned in the proclamation, but Burr knew his plot was discovered. Once more he had failed; and he fled. He changed clothes with a boatman on the Mississippi, and vanished into the forest.

For a month no one knew where he was, for beneath the battered white felt and homespun clothes of a river boatman no one recognised the dapper politician.

Meanwhile Burr was slowly making his way east hoping to reach the coast, and get away in some ship. He had still many friends, and one night he stopped at a cottage to ask his way to the house of one of these friends. In the cottage were two young men. One of them, named Perkins, looked keenly at the stranger. It seemed to him that his face and clothes were not in keeping, and his boots looked to smart for the rest of his get up.

After the stranger had gone he still thought about it. Then suddenly he said, "That was Aron Burr. Let us go after him and arrest him."

The other man, however, laughed at him, and refused to stir. So Perkins went off alone to find the sheriff, and soon the two were riding posthaste after the stranger.

When they reached the house to which Burr had asked the way, Perkins stayed outside with the horses, and the sheriff went into the house. He was going to arrest a bold bad man, and it would be a great feather in his cap. So in he marched feeling very firm and grand, expecting to find a terrible ruffian of a fellow. But instead of a terrible ruffian the sheriff found a pleasant, delightful gentleman, and a brilliant talker. So the poor sheriff's heart failed him. He really could not arrest this charming gentleman, and instead he stayed to hear him talk.

Meanwhile out in the cold Perkins waited with the horses, and as the hours went past and the sheriff did not return he guessed what had happened. But he was not going to be done out of his capture. So he went off to the captain of the fort, and told him of his discovery. The captain was not so easily charmed as the sheriff, and before the next evening Burr found himself a prisoner in the fort.