1Thomas Jefferson to Ebenezer Herrick, 20 February 1812 (Jefferson Papers)
machines; spinning [index entry]
2Thomas Jefferson to Ebenezer Herrick, 9 April 1812 (Jefferson Papers)
machines; spinning [index entry]
3Thomas Jefferson to Ebenezer Herrick, 16 June 1812 (Jefferson Papers)
machines; spinning [index entry]
4Thomas Jefferson to Ebenezer Herrick, 2 July 1812 (Jefferson Papers)
machines; spinning jenny [index entry]