Toward the end of July, 1806, Burr had accomplished all that could be done in the East, and prepared to begin his campaign to New Orleans. By strenuous efforts money had been raised to set the subordinate adventurers in motion. Among these were Erick Bollman, famous for an attempt to rescue Lafayette from confinement at Olmütz; a French officer named De Pestre, or Dupiester; Samuel Swartwout, a younger brother of Robert; and finally young Peter V. Ogden, a nephew of Dayton. The time had come when each actor must take his place, and must receive orders as to the _rôle_ he was to play. Of all Burr’s intimates, Wilkinson was not only the most important, but also the most doubtful. He had hung back and had made conditions. Since October, 1805, nothing had been heard from him, and his last letter had contained objections “deemed very silly.” At last a letter, dated May 13, arrived. This letter never saw the light; afterward, at the trial, Wilkinson challenged its production, and accused Burr of falsehood in asserting that it had been destroyed at Wilkinson’s request or with his knowledge. Only one conclusion might be taken as certain in regard to its contents,--they did not suit the situation of Dayton and Burr. Dayton’s reply was dated July 24, 1806, and was sent by his nephew, Peter V. Ogden, to Wilkinson. “It is now well ascertained that you are to be displaced in next session,” wrote Dayton, working on his old friend’s pride and fears. “Jefferson will affect to yield reluctantly to the public sentiment, but yield he will. Prepare yourself, therefore, for it. You know the rest. You are not a man to despair, or even despond, especially when such prospects offer in another quarter. Are you ready? Are your numerous associates ready? Wealth and glory! Louisiana and Mexico!” Together with this exhortation from Dayton, Burr sent a cipher despatch, afterward famous as the key to the whole conspiracy. Published at different times with varying versions, as suited Wilkinson’s momentary objects, the correct reading probably ran very nearly as follows:--