1Thomas Jefferson to Joseph Coppinger, 25 April 1815 (Jefferson Papers)
I have to acknolege the reciept of your favor of the 6 th . I have no doubt, either in a moral or...
2From Thomas Jefferson to Joseph Coppinger, 23 October 1802 (Jefferson Papers)
The invention mentioned in your letter of the 17th. inst is certainly of great importance to...