London 2d. Octr. 1807
Having formerly had the Honor of being in correspondence with the Government of the American States respecting the Nature and Prevention of the Yellow Fever, and observing that in my humble opinion some errers still prevail on that subject so interesting to the United States, I take the liberty of enclosing a copy of a small Tract in form of a letter to a foreign Minister submitting to your better judgement how far it may be useful to the Government over which you preside.
I have the Honor to be with High Respect Sir Your most Obedient & very Humbl Servant
DLC: Papers of Thomas Jefferson.