Wilkinson's treachery dates from his first visit to New Orleans.

Exactly when he was first pensioned outright is not certain; but doubtless he was the corrupt recipient of money from the beginning.] He did his best to persuade the Spaniards to adopt measures which would damage both the East and West and would increase the friction between them.

He vociferously insisted that in going to such extremes of foul treachery to his country he was actuated only by his desire to see the Spanish intrigues attain their purpose; but he was probably influenced to a much greater degree by the desire to retain as long as might be the monopoly of the trade with New Orleans.
The Spanish Conspiracy.
The Intendant Navarro, writing to Spain in 1788, dwelt upon the necessity of securing the separation of the Westerners from the old thirteen States; and to this end he urged that commercial privileges be granted to the West, and pensions and honors showered on its leaders.
Spain readily adopted this policy of bribery.

Wilkinson and Sebastian were at different times given sums of money, small portions of which were doubtless handed over to their own agents and subordinates and to the Spanish spies; and Wilkinson asked for additional sums, nominally to bribe leading Kentuckians, but very possibly merely with the purpose of pocketing them himself.

In other words, Wilkinson, Sebastian, and their intimate associates on the one hand, and the Spanish officials on the other, entered into a corrupt conspiracy to dismember the Union.
Wilkinson's Intrigues.
Wilkinson took a leading part in the political agitations by which Kentucky was shaken through out these years.