1Thomas Jefferson to Henry M. Brackenridge, 20 September 1813 (Jefferson Papers)
Your favor of July 25. is just now recieved: and I have read with pleasure the account it gives of the antient mounds & fortifications in the Western country. I never before had an idea that they were so numerous. presuming the communication was meant for me in my relation with the Philosophical society , and deeming it well worthy their attention, I have forwarded it to them, and with my...