1Robert Patterson to Thomas Jefferson, 23 September 1811 (Jefferson Papers)
Patterson, Robert; and astronomical case clock [index entry]
2Robert Patterson to Thomas Jefferson, 30 November 1812 (Jefferson Papers)
Patterson, Robert; and astronomical case clock [index entry]
3Robert Patterson to Thomas Jefferson, 12 January 1813 (Jefferson Papers)
Patterson, Robert; and astronomical case clock [index entry]
4Robert Patterson to Thomas Jefferson, 25 March 1813 (Jefferson Papers)
Patterson, Robert; and astronomical case clock [index entry]
5Robert Patterson to Thomas Jefferson, 24 April 1813 (Jefferson Papers)
Patterson, Robert; and astronomical case clock [index entry]
6Robert Patterson to Thomas Jefferson, 25 August 1815 (Jefferson Papers)
Patterson, Robert; and astronomical case clock [index entry]
7Robert Patterson to Thomas Jefferson, 24 October 1815 (Jefferson Papers)
Patterson, Robert; and astronomical case clock [index entry]
8Robert Patterson to Thomas Jefferson, 28 November 1815 (Jefferson Papers)
Patterson, Robert; and astronomical case clock [index entry]