Head Quarters Dobbs ferry Augt 17th 1781
My Dear Marquis
I have been favour’d with yours of the 31st ulto and 6th inst. and as General du Portail will hand you this, he will be able to give every intelligence you wish relative to my movements in this Department; as he is sent in confidence he will make known to you all my designs. I am Dr Marquis, Your Mt Obt Servant.
DLC: Papers of George Washington.