1To Thomas Jefferson from Joachim Frederick Eckard, 12 April 1805 (Jefferson Papers)
A scientific Gentleman at Copinhagen gave me in charge, when I was there last Winter, to convey...
2From Thomas Jefferson to Joachim Frederick Eckard, 30 April 1805 (Jefferson Papers)
Mr. Patterson safely delivered me your letter of the 12th. inst. with that of mr Weinwich; and...
3To Thomas Jefferson from Joachim Frederick Eckard, 2 May 1805 (Jefferson Papers)
This day I had the honour of of your Excellencies condescending letter with an inclosure for Mr....