1“Johannes Vonderpuff” to Thomas Jefferson, 1 October 1814 (Jefferson Papers)
Italian language; writings in [index entry]
2Destutt de Tracy to Thomas Jefferson, 11 April 1818 (Jefferson Papers)
Italian language; writings in [index entry]
3Francis Adrian Van der Kemp to Thomas Jefferson, 8 May [1819] (Jefferson Papers)
Italian language; writings in [index entry]
4Louis H. Girardin to Thomas Jefferson, 16 August 1820 (Jefferson Papers)
Italian language; writings in [index entry]
5Destutt de Tracy to Thomas Jefferson, 22 February 1821 (Jefferson Papers)
Italian language; writings in [index entry]