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No. | Author | Recipient | Title | Date | Context |
---|---|---|---|---|---|
1 | Jefferson, Thomas | Hepburn, Alexander | Thomas Jefferson to Alexander Hepburn, 20 May 1820 | 1820-05-20 | machines; threshing [index entry] |
2 | Jefferson, Thomas | Hepburn, Alexander | Thomas Jefferson to Alexander Hepburn, 7 August 1819 | 1819-08-07 | machines; threshing [index entry] |