[Pelham]

George Washington's letter of January 15, 1799 to Patrick Henry addresses the Resolves and his concern that the men promoting them were opposed to the General Government and seeking to destroy the Union.

So while the language of the resolutions doesn't mention secession the implication of their logic was already recognized by Washington, among others. The Resolves and their Compact Theory of the American founding would remain a philosophical basis for both secession and nullification.

[CougarGA7]

I see, the letter is based on the Kentucky Resolutions of 1798, not the Kentucky Resolution of 1799 which I was referring to. Even still in that set of 9 resolution is an implicit indication of desire to preserve the Union and a stated dedication to that compact.

This still it centered on an enumerated verses implied interpretation of the Constitution which was a major issue of the time, and not secession.