1Everard Hall to Thomas Jefferson, 19 January 1818 (Jefferson Papers)
machines; pumps [index entry]
2Thomas Cooper to Thomas Jefferson, 13 [March] 1819 (Jefferson Papers)
machines; pumps [index entry]
3Rodolph Schaer to Thomas Jefferson, 25 March 1819 (Jefferson Papers)
machines; pumps [index entry]
4Enclosure: Arthur S. Brockenbrough’s Statement of his Drafts on the University of Virginia Bursar, [ca. 26 November … (Jefferson Papers)
machines; pumps [index entry]