1Thomas Jefferson to Robert Walsh, 9 January 1818 (Jefferson Papers)
I returned a few days ago only from a long visit to my other home, the Poplar Forest . this must apologise for my long detention of your book. I have read it with great delight. Montucla is so voluminous that we can read him but once. but Playfair has brought into a small compass the leading facts in Mathematical history, and presented them so philosophically to our view, as that the memory...
2Thomas Jefferson to Robert Walsh, 19 February 1818 (Jefferson Papers)
Your favor of Jan. 27. was duly recieved, and I now inclose you Tracy ’s tract on the certainty of the operations of the human understanding. he rests them on our sensations, of which we are very certain, and on this basis erects demonstrations irresistably cogent, I think, against Scepticism, a disease of the mind so uncomfortable that it is charity to exhibit it’s cure, if there exists one....