Thomas Jefferson’s leadership of the fledgling American Philosophical Society was appropriate. His perspective was entirely the same as its stated purposes, and his contributions to it have continued to enrich and guide it.
Tag: Thomas Jefferson
The Indian Vocabularies
Due to the many unfortunate events which followed Lewis’s death, in 1809, the Indian vocabularies the captains had carefully collected are now lost, and were never made available to the public.
Jefferson’s Megalonyx
Thomas Jefferson first believed them to be from a kind of lion, which he thought might still survive in the distant wilds of western America. No doubt Lewis had held them too and would be looking for live specimens.
The Astronomy Notebook
Known now as the “Astronomy Notebook,” this extraordinary document has been an obscure and often neglected detail in the history of the Lewis and Clark Expedition. Transcribed in full with commentary by Robert Bergantino.
Jefferson’s Debt Paid at Last
Lewis and Clark made celestial observations at “all remarkeable points on the rivers.” Hassler was selected to complete the longitude calculations from that data, but he never finished the job. Jefferson was not satisfied.
Assessing the Legacy of Lewis and Clark
The author proposes a few metaphors for the Lewis and Clark story, not in any definitive way, but merely to help us all think about the legacy of the expedition.
Jefferson’s Geographic Directive
Mapping is the human equivalent of an animal marking its territory by leaving scent, spoor, or other traces. Jefferson’s instructions to fix the trading route to the Pacific by observation meant that Lewis and Clark should mark territory.
Early American Entomology
There were only four notable 18th century naturalists who showed much interest in America’s insects: a young Englishman named Mark Catesby, Finnish botanist Peter Kalm, Philadelphian William Bartram, and Reverend Frederick Melsheimer of New Hampshire.
The Mineral Specimens
Although not nearly as celebrated as their botanical and zoological work, Lewis and Clark collected a multitude of mineralogical specimens throughout the expedition.
The Empty Anchorage
“the Ocian is imedeately in front and gives us an extensive view of it from Cape disapointment to Point addams,” reported William Clark on 15 November 1805. But he saw no ships at anchor. Nothing.
La Freeman-Custis Expedición
Narrado tanto en inglés como en español, Daniel Flores narra la historia de una exploración paralela y sureña ahora casi olvidada.
The Freeman-Custis Expedition
Narrated in both English and Spanish, Daniel Flores tells the story of a parallel, southern exploration now nearly forgotten.
The Kansas River Observations
Celestial observations at the Kansas and Missouri river confluence began shortly after 8 a.m. on 27 June 1804. The first observation would provide the data necessary to calculate the magnetic declination.
David Thompson
The life and times of these three explorers intertwined in a number of odd and interesting ways, often brought together by far-reaching hand of Thomas Jefferson. Tracing these connections opens a window onto every conceivable aspect of the period.
Rush and the Expedition
The advice Dr. Rush had given Lewis often sounds rather odd or useless by modern standards, and wasn’t followed to the letter by the captains, but it fulfilled Jefferson’s request.
Jefferson the Violinist
One of Thomas Jefferson’s favorite compositions was the Sonata for Violin and Continuo, Opus 5, written by Corelli. Using a violin such as Jefferson owned, violinist Samuel Taylor plays the theme and two of the variations.
Jefferson’s Monticello
After some eight months of planning and discussion, President Thomas Jefferson handed his twenty-eight-year-old secretary, Captain Meriwether Lewis, a letter containing instructions for the conduct of one of the most significant undertakings in American history.
Postscript to the Purchase
Determining the extent of the upper Missouri watershed was the single most important task Lewis and Clark faced. Their search for the westernmost source of the Jefferson River nearly cost them their lives.
The Louisiana Purchase
Easter week in Paris, 1803, was truly momentous for the young United States of America. The American Minister to France, Robert R. Livingston was sent to discuss the difficult question of New Orleans, the Mississippi and Franco-American relations.
Mastodons
The American fauna was not made up of degenerate forms of Old World animals. And it was not beyond the realm of possibility to find those elusive mastodons and megalonyxes alive. To imagine this sort of thing must have inspired awe in Lewis.
Discover More
- The Lewis and Clark Expedition: Day by Day by Gary E. Moulton (University of Nebraska Press, 2018). The story in prose, 14 May 1804–23 September 1806.
- The Lewis and Clark Journals: An American Epic of Discovery (abridged) by Gary E. Moulton (University of Nebraska Press, 2003). Selected journal excerpts, 14 May 1804–23 September 1806.
- The Lewis and Clark Journals. by Gary E. Moulton (University of Nebraska Press, 1983–2001). The complete story in 13 volumes.
This page was funded in part by a grant from the National Park Service's Challenge Cost Share Program.
This site is provided as a public service by the
Lewis and Clark Trail Heritage Foundation
with cooperation and funding from the following organizations:
- Lewis and Clark National Historic Trail
- Montana Committee for the Humanities
- Idaho Governor's Lewis and Clark Trail Committee
- The Capital Gallery (Lewis and Clark Fort Mandan Foundation)
- Yellowstone Public Radio
Unless otherwise noted, journal excerpts are from The Journals of the Lewis and Clark Expedition, edited by Gary E. Moulton, 13 vols. (Lincoln: University of Nebraska Press, 1983-2001).