"G. W. Snyder:
It was some Time since that a Book fell into my Hands entituled “Proofs of a Conspiracy &c. by John Robison,” which gives a full Account of a Society of Freemasons, that distinguishes itself by the Name “of Illuminati,” whose Plan is to overturn all Government and all Religion, even natural; and who endeavour to eradicate every Idea of a Supreme Being, and distinguish Man from Beast by his Shape only. A Thought suggested itself to me, that some of the Lodges in the United States might have caught the Infection, and might cooperate with the Illuminati or the Jacobine Club in France. Fauchet is mentioned by Robison as a zealous Member: and who can doubt of Genet and Adet? Have not these their Confidants in this Country? They use the same Expressions and are generally Men of no Religion. Upon serious Reflection I was led to think that it might be within your Power to prevent the horrid Plan from corrupting the Brethren of the English Lodge over which you preside.
George Washington replied on 25 Sept.:
Sir, Many apologies are due to you, for my not acknowledging the receipt of your obliging favour of the 22d Ulto, and for not thanking you, at an earlier period, for the Book you had the goodness to send me.
I have heard much of the nefarious, & dangerous plan, & doctrines of the Illuminati, but never saw the Book until you were pleased to send it to me. The same causes which have prevented my acknowledging the receipt of your letter, have prevented my reading the Book, hitherto; namely—the multiplicity of matters which pressed upon me before, & the debilitated state in which I was left after, a severe fever had been removed. And which allows me to add little more now, than thanks for your kind wishes and favourable sentiments, except to correct an error you have run into, of my Presiding over the English lodges in this Country. The fact is, I preside over none, nor have I been in one more than once or twice, within the last thirty years. I believe notwithstandings, that none of the Lodges in this Country are contaminated with the principles ascribed to the Society of the Illuminati. It was not my intention to doubt that, the Doctrines of the Iluminati, and principles of Jacobinism had not spread in the United States. On the contrary, no one is more fully satisfied of this fact than I am. The idea I meant to convey, was, that I did not believe that the Lodges of Free Masons in this Country had, as Societies, endeavoured to propagate the diabolical tenets of the first, or the pernicious principles of the latter (if they are susceptible of seperation). That Individuals of them may have done it, and that the founder, or instrument employed to found, the Democratic Societies in the United States, may have had these objects—and actually had a seperation of the People from their Government in view, is too evident to be questioned."
To George Washington from G. W. Snyder, 22 August 1798 (https://founders.archives.gov/documents/Washington/06-02-02-0435)