1Thomas Jefferson to Thomas Voigt, 20 May 1813 (Jefferson Papers)
Voigt, Thomas; and TJ’s astronomical case clock [index entry]
2Thomas Jefferson to Thomas Voigt, 9 April 1813 (Jefferson Papers)
Voigt, Thomas; and TJ’s astronomical case clock [index entry]
3Thomas Jefferson to Robert Patterson, 10 November 1811 (Jefferson Papers)
Voigt, Thomas; and TJ’s astronomical case clock [index entry]
4Thomas Jefferson to Robert Patterson, 29 May 1812 (Jefferson Papers)
Voigt, Thomas; and TJ’s astronomical case clock [index entry]
5Thomas Jefferson to Robert Patterson, 8 April 1813 (Jefferson Papers)
Voigt, Thomas; and TJ’s astronomical case clock [index entry]
6Thomas Jefferson to Robert Patterson, 27 December 1812 (Jefferson Papers)
Voigt, Thomas; and TJ’s astronomical case clock [index entry]
7Robert Patterson to Thomas Jefferson, 24 April 1813 (Jefferson Papers)
Voigt, Thomas; and TJ’s astronomical case clock [index entry]
8Robert Patterson to Thomas Jefferson, 25 August 1815 (Jefferson Papers)
Voigt, Thomas; and TJ’s astronomical case clock [index entry]
9Robert Patterson to Thomas Jefferson, 23 September 1811 (Jefferson Papers)
Voigt, Thomas; and TJ’s astronomical case clock [index entry]
10Robert Patterson to Thomas Jefferson, 30 November 1812 (Jefferson Papers)
Voigt, Thomas; and TJ’s astronomical case clock [index entry]