1Thomas Jefferson to John Patterson, 31 January 1819 (Jefferson Papers)
A Memoir on Contagion, more especially as it respects the Yellow Fever (N. Potter) [index entry]
2Thomas Jefferson to Nathaniel Potter, 17 January 1819 (Jefferson Papers)
A Memoir on Contagion, more especially as it respects the Yellow Fever (N. Potter) [index entry]
3John Patterson to Thomas Jefferson, 6 January 1819 (Jefferson Papers)
A Memoir on Contagion, more especially as it respects the Yellow Fever (N. Potter) [index entry]