1Thomas Jefferson to Julian Ursin Niemcewicz, 15 December 1813 (Jefferson Papers)
Your letter of Sep. 4. 10. was 10. months on it’s passage to me, having been recieved on the 7 th of July 11. I addressed my answer to you without delay, acknoleging my obligations to the Royal society of the friends of science in Warsaw for their nomination of me as one of their members, expressing my sense of the honor of being associated with their body, and tendering any services which at...