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.
Buttons, Basilicon, and a Dying Man’s Tomahawk
At Camp Chopunnish, four narrators record a single day of bartered coat-buttons, recovered tomahawks, and Spanish dollars traced to distant Snake Indians — revealing how each writer frames…
Cold, Cartography, and the Big White Chief: Four Voices at Fort Mandan
On a frigid January day at Fort Mandan, four expedition journalists record strikingly different scenes — from Clark's careful cartography with a Mandan chief to Whitehouse's ethnographic notes…
A Warning Shot, a Swimming Supplicant, and a Ruined Ricara Village
Four narrators record the same October day on the Missouri, but only Clark notes the skipped musket ball and the abandoned Arikara fortification on the island. The enlisted…
Eight Deer, One Trade, and a Census of Nations
On a single waiting day at the edge of the Bitterroots, four narrators record the same small events with strikingly different priorities — from mosquitoes and ravens to…
Boils, Bear-Fat, and the Rhythm of a Repair Day
On a rainy Monday near present-day Boonville, the Corps paused to mend rope and oars while six hunters crossed the river. Only Clark records the medical toll —…
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.
The Omaha (Maha) Nation: A Diminished People in the Journals of Lewis & Clark
Encountered as a once-powerful nation reduced by smallpox, the Omaha appear in the journals as absent hosts, grieving survivors, and distant adversaries…
The Clatsop Nation: Hosts of the Corps’ Pacific Winter
For more than three months in the winter of 1805–1806, the Clatsop people of the lower Columbia were the nearest neighbors, traders,…
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 Flathead Salish: Allies in the Bitterroot
From the friendly council at Ross's Hole to the river that bore their name, the Flathead Salish (Tushepaws) provided the Corps of…
Silas Goodrich: The Expedition’s Fisherman
Private Silas Goodrich served as the Corps of Discovery's most dedicated angler, contracted syphilis at Fort Clatsop, and was among the small…
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…
Auguste Chouteau: St. Louis Patron of the Corps of Discovery
Co-founder of St. Louis and dean of its fur trade, Auguste Chouteau appears in the journals as host, supplier, and commercial presence…
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…
George Shannon: The Youngest Soldier of the Corps of Discovery
From a starving boy lost on the prairie to a trusted hunter and trader on the return journey, George Shannon's three-year apprenticeship…
The Chinook Nation: First Encounters at the Pacific
When the Corps of Discovery reached the mouth of the Columbia in November 1805, the Chinook were the first nation to greet…
The Arikara Nation: Diplomatic Crossroads on the Upper Missouri
Across forty-two journal entries, the Arikara emerge as central players in the expedition's diplomatic strategy — corn-growing villagers caught between Sioux pressure…
John Colter: The Hunter Who Walked Away From Home
From Pryor's mess at Camp Dubois to a solitary parting on the upper Missouri, John Colter emerges in the journals as one…
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.