1To Thomas Jefferson from John Ponsonby, 26 June 1802 (Jefferson Papers)
Messrs. Ackermann, Suardy & Co. of London having forwarded to me, some proofs of their Invention...
2From Thomas Jefferson to John Ponsonby, 14 July 1802 (Jefferson Papers)
I am to thank you for the specimens of waterproof cotton and cloth which you were so good as to...