11Thomas Jefferson to Jacob Alrichs, 10 August 1812 (Jefferson Papers)
Alrichs & Dixon (Wilmington, Del., firm); and carding machine [index entry]
12Thomas Jefferson to Patrick Gibson, 26 February 1813 (Jefferson Papers)
Alrichs & Dixon (Wilmington, Del., firm); and carding machine [index entry]
13Thomas Jefferson to James Ronaldson, 12 January 1813 (Jefferson Papers)
Alrichs & Dixon (Wilmington, Del., firm); and carding machine [index entry]