1Thomas Jefferson to William Thornton, 14 January 1812 (Jefferson Papers)
machines; spinning [index entry] machines; spinning jenny [index entry]
2Thomas Jefferson to William Thornton, 24 April 1812 (Jefferson Papers)
machines; spinning [index entry] machines; spinning jenny [index entry]
3Thomas Jefferson to William Thornton, 20 June 1812 (Jefferson Papers)
machines; spinning [index entry]
4Thomas Jefferson to William Thornton, 3 July 1812 (Jefferson Papers)
machines; spinning [index entry]