Reading every journal at once. What no human has done.
For every date with two or more expedition narrators writing, this database produces a side-by-side analysis comparing what each preserved. Long-form thematic essays trace patterns across years. Every claim cites a specific journal entry. Every analysis is reviewed before publication.
The Silence of Meriwether Lewis: What Clark and the Sergeants Preserved, August 1805–January 1806
For roughly 135 days spanning the Bitterroot crossing, the descent of the Columbia, and the founding of Fort Clatsop, Meriwether Lewis put down his pen. The expedition's most consequential geographic transit survives only through the eyes of Clark, Ordway, Gass, and Whitehouse — a documentary absence that shapes everything we…
Read the analysisFeatured analyses
A curated mix — thematic essays, per-figure deep dives, and rich multi-narrator dates.
Diet Across the Expedition: A Seasonal Analysis
From the bison-rich winter at Fort Mandan to the salmon and wapato of the Pacific coast, the Corps of Discovery's diet shifted dramatically with season, geography, and Indigenous…
Sacagawea: The Shoshone Interpreter of the Corps of Discovery
From her recruitment at Fort Mandan in November 1804 to her family's farewell at the Mandan villages in August 1806, Sacagawea — the young Shoshone wife of Toussaint…
Cameahwait: The Shoshone Chief Who Saved the Expedition
Brother to Sacagawea and chief of the Lemhi Shoshone, Cameahwait provided the horses and guidance without which the Corps of Discovery could not have crossed the Rocky Mountains.
A Failed Hunt and a Woman Seeking Refuge
On a snowy January day at Fort Mandan, Ordway and Clark record the same hunting party with strikingly different results — and Clark alone preserves the arrival of…
Tabbo Creek, Hard Water, and the First Mosquito Bars
On a day of swift current and rope-hauling near Tabbo Creek, five narrators record the same passage with strikingly different priorities — from Clark's lake of waterfowl to…
Raising Walls and Recording Worlds: Two Sergeants at Fort Mandan
On a single November day at Fort Mandan, Patrick Gass and John Ordway produced strikingly different records — one a compressed retrospective of violence and diplomacy, the other…
Four Pens, One River: Departure Day Above Fort Mandan
On the second day beyond Fort Mandan, four expedition journalists record the same stretch of river in strikingly different registers — from Gass's terse mileage to Lewis's naturalist…
Lewis Departs Overland: A Captain’s Calculated Risk and a Lost Man’s Return
On August 9, 1805, Lewis sets out ahead with three men to find the Shoshone while Shannon rejoins after three days lost. Five narrators record the same morning,…
Thematic essays
Long-form analyses that cut across many dates — diet, illness, language, weather, copying patterns, naming conventions.
Diet Across the Expedition: A Seasonal Analysis
From the bison-rich winter at Fort Mandan to the salmon and wapato of the Pacific coast, the Corps of Discovery's diet shifted…
Diet Across the Expedition: A Seasonal Analysis
From buffalo feasts on the northern plains to dog meat purchased on the Columbia and elk steaks rationed at Fort Clatsop, the…
Per-narrator studies
One essay for each expedition diarist — their distinctive voice, omissions, recurring themes, and how their writing evolved.
Key figure profiles
AI-assisted biographical syntheses drawn from every entry that mentions each person or nation.
Thomas Jefferson: The Distant Architect of the Voyage of Discovery
Though never present on the trail, President Thomas Jefferson shaped every mile of the Corps of Discovery's journey. He appears in the…
François Labiche: Hunter, Waterman, and Interpreter of the Corps of Discovery
A skilled hunter, reliable waterman, and multilingual interpreter, François Labiche appears throughout the journals as one of the expedition's most dependable enlisted…
York: The Enslaved Man Who Crossed a Continent
Enslaved by William Clark from boyhood, York walked, paddled, hunted, voted, and traded across 8,000 miles with the Corps of Discovery —…
George Catlin in the Lewis & Clark Journal Record
George Catlin, the famed painter of Native American life, does not appear in the Lewis and Clark journals — but his later…
The Nez Perce (Chopunnish): Allies of the Bitterroot and Kooskooske
Saviors at Weippe Prairie, keepers of the expedition's horses, and gracious hosts during the long spring wait of 1806, the Nez Perce…
The Yakama Nation in the Lewis & Clark Journals: A Brief Encounter at the Great Confluence
The Yakama people appear in the expedition record at a single pivotal moment — the Corps of Discovery's October 1805 arrival at…
The Walla Walla Nation and Chief Yelleppit: Hosts of the Homeward Crossing
In late April 1806, the Walla Walla people and their principal chief Yelleppit provided the Corps of Discovery with horses, canoes, food,…
The Sioux Nation in the Lewis & Clark Journals: A Note on Absent Sources
Although the Sioux figure prominently in the documented history of the Lewis and Clark Expedition, the source set provided for this synthesis…
Albert Bierstadt: A Painter Beyond the Journals
Albert Bierstadt, the celebrated nineteenth-century landscape painter of the American West, does not appear in the journals of the Lewis and Clark…
The Shawnee Nation in the Lewis & Clark Record
Though the Corps of Discovery did not encounter the Shawnee homeland during their westward journey, the Shawnee people occupied a notable place…
Charles Marion Russell: The Cowboy Artist and the Lewis & Clark Imagination
Charles Marion Russell (1864–1926) does not appear in the Lewis and Clark journals — he was born nearly six decades after the…
Karl Bodmer: A Note on Absence from the Lewis & Clark Journals
Despite his fame as a visual chronicler of the upper Missouri, the Swiss painter Karl Bodmer does not appear in the journals…
Browse by date
853 date-bound analyses, in chronological order.
How these analyses are written
AI-Assisted Each analysis is drafted by Anthropic Claude using only the primary-source journal entries cited within it, then reviewed by a human editor before publication. AI surfaces patterns that single-narrator scholarship cannot — copying lineages, prose-register shifts, side-by-side accounts of the same day from opposite sides of the camp. Every claim must trace to a specific journal entry. We're transparent about the method because we believe it's defensible scholarship, not a substitute for it.