1Thomas Jefferson to Thomas B. Robertson, 20 April 1812 (Jefferson Papers)
Robertson, Thomas Bolling; letters to [index entry]
2Thomas Jefferson to Thomas B. Robertson, 7 November 1819 (Jefferson Papers)
Robertson, Thomas Bolling; letters to [index entry]
3Thomas Jefferson to Benjamin Morgan and Thomas B. Robertson, 26 May 1820 (Jefferson Papers)
Robertson, Thomas Bolling; letters to [index entry]
4Thomas Jefferson to Thomas B. Robertson, 26 August 1820 (Jefferson Papers)
Robertson, Thomas Bolling; letters to [index entry]