31To Thomas Jefferson from Robert Patterson, 19 December 1801 (Jefferson Papers)
The art of secret writing, or, as it is usually termed, writing in cypher , has occasionally...
32To Thomas Jefferson from Robert Patterson, 30 December 1805 (Jefferson Papers)
Some years ago, I remember to have laid before you a scheme of secret writing , which you were...
33To Thomas Jefferson from Robert Patterson, 15 March 1803 (Jefferson Papers)
I have been honoured with your favour of the 2d. and thank you for your confidence, which I will...
34To Thomas Jefferson from Robert Patterson, 3 March 1806 (Jefferson Papers)
I beg leave to introduce to your notice Mr. Hassler, a Gentleman lately from Switzerland. He is a...
35To Thomas Jefferson from Robert Patterson, 23 November 1805 (Jefferson Papers)
I have been honoured with your favour of the 16th. inclosing a method of finding the longitude...
36To Thomas Jefferson from Robert Patterson, 12 April 1802 (Jefferson Papers)
I have been honored with your favour of the 22d Ult. and feel, with a lively sense, the...
37To Thomas Jefferson from Chandler Price, 8 March 1806 (Jefferson Papers)
I am informed Mr Patrick Ysnardi Son of Joseph Ysnardi Esqr. American Consul at Cadiz, is now on...