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No. | Author | Recipient | Title | Date | Context |
---|---|---|---|---|---|
1 | Humboldt, Alexander von | Jefferson, Thomas | Alexander von Humboldt to Thomas Jefferson, 20 December … | 1811-12-20 | Pike, Zebulon Montgomery; and Humboldt’s map [index entry] |
2 | Jefferson, Thomas | Humboldt, Alexander von | Thomas Jefferson to Alexander von Humboldt, 6 December … | 1813-12-06 | Pike, Zebulon Montgomery; and Humboldt’s map [index entry] |