1Thomas Jefferson to Thomas Ritchie, 22 May 1809 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
2Thomas Jefferson to Thomas Ritchie, 19 January 1810 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
3Thomas Jefferson to Thomas Ritchie, 15 March 1810 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
4Thomas Jefferson to Thomas Ritchie, 19 September 1813 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
5Thomas Jefferson to Thomas Ritchie, 15 August 1814 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
6Thomas Jefferson to Thomas Ritchie, 27 September 1814 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry] Ritchie, Thomas; letters to accounted for [index entry]
7Thomas Jefferson to Thomas Ritchie, 20 October 1815 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
8Thomas Jefferson to Thomas Ritchie, 21 January 1816 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
9Thomas Jefferson to Thomas Ritchie, 8 March 1816 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
10Thomas Jefferson to Thomas Ritchie, 6 April 1816 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
11Thomas Jefferson to Thomas Ritchie, 3 September 1816 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
12Thomas Jefferson to Thomas Ritchie, [29] August 1817 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
13Thomas Jefferson to Thomas Ritchie, 1 November 1817 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
14Thomas Jefferson to Thomas Ritchie, 20 March 1818 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
15Thomas Ritchie to Thomas Jefferson, [ca. 21 May 1818] (Jefferson Papers)
Ritchie, Thomas; letters to accounted for [index entry]
16Thomas Jefferson to Thomas Ritchie, 19 June 1818 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
17Thomas Jefferson to Thomas Ritchie, 7 December 1818 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
18Thomas Jefferson to Thomas Ritchie, 14 February 1819 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
19Thomas Jefferson to Thomas Ritchie, 11 June 1819 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
20Thomas Jefferson to Thomas Ritchie, 25 December 1820 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
21Thomas Jefferson to Thomas Ritchie, 7 January 1822 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
22Thomas Jefferson to Thomas Ritchie, 10 June 1822 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]
23Thomas Jefferson to Thomas Ritchie, 6 August 1822 (Jefferson Papers)
Ritchie, Thomas; letters to [index entry]