Fort Mandan April the 3rd. 1805.
It being the wish of Captain Lewis, I take the liberty to send you, for your own perusal the notes which I have taken in the form of a journal in their original state. you will readily perceive in reading over those notes, that many parts are incorrect. owing to the variety of information received at different times, I most sincerely wish that leasure had permitted me to offer them in a more correct form.
Receive I pray you my unfained acknowledgements for your friendly recollection of me in your letters to my friend and companion Captn. Lewis. and be assured of the sincere regard with which I have the honor to be.
Your most obedient and Humble Servent
DLC: Papers of Thomas Jefferson.