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 buffalo feasts on the northern plains to dog meat purchased on the Columbia and elk steaks rationed at Fort Clatsop, the Corps of Discovery's diet shifted dramatically…
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.
Fleas, Elk, and the Echoes Between Captains’ Pens
On a wet January day at Fort Clatsop, four expedition narrators record the same small events with strikingly different breadth. A close comparison reveals the textual dependence between…
Camas in Bloom and the Mirror of the Captains’ Journals
On a warm June day at the foot of the Bitterroots, four expedition journalists record the same camp — but Lewis and Clark write nearly identical entries while…
Return to Pleasant Camp: Specimen Hunting and the Bounty of Plums
On August 28, 1806, the homeward-bound expedition deliberately halted at a site they had named Pleasant Camp two years earlier. Clark and Ordway record the same encampment with…
Departing Fort Clatsop: Four Voices Ascend the Columbia
On the first full day of the homeward journey, four expedition journalists record the same passage past Wappato Island in strikingly different registers — from Gass's brisk admiration…
Sacagawea’s Capture Site and a Captain Lost Among Beaver Dams
On July 30, 1805, the expedition passed the spot where Sacagawea was seized by the Hidatsa years earlier. While Clark battled rapids and Lewis became separated in a…
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.
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 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,…
John Shields: The Expedition’s Indispensable Artisan
Blacksmith, gunsmith, and woodworker John Shields proved one of the most practically valuable men of the Corps of Discovery — repairing arms,…
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…
The Osage Nation in the Lewis & Clark Journals: A Synthesis
Though no journal entries in our tagged corpus directly reference the Osage Nation, their shadow falls across the early expedition record through…
The Mandan Nation: Heart of the Upper Missouri
From October 1804 through April 1805, the Mandan villages on the upper Missouri became the expedition's home, classroom, and trading partner —…
The Iowa Tribe in the Lewis & Clark Journals: A Note on Absence
Although the Iowa (Ioway) Nation appears peripherally in the broader ethnographic horizon of the Lewis and Clark Expedition, the corpus of journal…
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…
William Bratton: Hunter, Saltmaker, and Patient of the Corps of Discovery
A Virginia-born private whose journey through the journals traces a path from messmate and marksman to gravely ill convalescent — and finally,…
The Otoe-Missouria: First Council on the Plains
The Otoe and Missouria nations gave Lewis and Clark their first formal diplomatic council with Native peoples — a meeting at Council…
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…
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…
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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.