11To Thomas Jefferson from Charles Bonnycastle, 27 March 1826 (Jefferson Papers)
Both M r King’s letters mention the apparatus, but as the last is the most specific I have sent...
12To Thomas Jefferson from Charles Bonnycastle, 16 April 1826 (Jefferson Papers)
By a letter which I received from England I have been informed that the warehouse in which part...
13From Thomas Jefferson to Charles Bonnycastle, 21 April 1826 (Jefferson Papers)
I omitted, in conversn with you yesterday to observe on the arrangement of the Elliptical...
14To Thomas Jefferson from Charles Bonnycastle, 24 May 1826 (Jefferson Papers)
Having found it impossible to carry into effect the arrangements which you were good enough to...