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.
Four Pens on Hungry Creek: Snow, Doubt, and the Captains’ Shared Draft
On a single day in the Bitterroots, four expedition journalists describe the same alarming snowpack. Their parallel entries reveal not only the mountain's hazards but the captains' collaborative…
Plumb Creek and the Yellow Bluffs: Four Views of a September Reach
On a cold, clear morning along the Missouri, four expedition journalists record the same landmarks—yellow bluffs, chalk banks, Plumb Creek—but diverge sharply in what they choose to see,…
Stones, Visitors, and Stray Pages: Three Voices at Fort Mandan
On a clouded winter day at Fort Mandan, Ordway documents a failed stone-splitting experiment, Clark records a diplomatic visit from a North West Company trader, and Gass's text…
A Damp Christmas at Fort Clatsop: Two Enlisted Men Mark the Day
On Christmas Day 1805, sergeants Patrick Gass and John Ordway recorded nearly identical accounts of the Corps' first morning at Fort Clatsop — yet small divergences in tone…
Three Voices, One Standoff: Re-Encountering the Tetons on the Lower Missouri
On the return descent, the Corps meets the same Teton Sioux band that nearly came to blows with them in 1804. Gass, Ordway, and Clark each record the…
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 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…
The Blackfeet: Adversaries on the Marias
The Piegan Blackfeet appear briefly but consequentially in the Lewis and Clark journals — culminating in the only deadly violence of the…
Hugh McNeal: A Private’s Long March
Private Hugh McNeal of the Corps of Discovery served as Lewis's companion at the Shoshone encounter, suffered illness at Fort Clatsop, and…
The Pawnee Nation: A Distant Presence in the Expedition’s Record
Though the Corps of Discovery never held formal council with the Pawnee, the nation hovers at the edges of the journals as…
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 Otoe Nation: First Diplomatic Council on the Missouri
The Otoe (Oto) people were the first Native nation with whom Lewis and Clark held a formal diplomatic council, meeting at the…
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…
The Yankton Sioux: Calumet Bluff and the Long Shadow of Diplomacy
From the ceremonial council at Calumet Bluff in August 1804 to chance encounters with traders bound for their villages two years later,…
The Crow (Apsáalooke) in the Lewis & Clark Journals: A Distant but Decisive Presence
Though Lewis and Clark never held a council with the Apsáalooke, the Crow nation shadowed the expedition's path across the northern plains…
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…
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,…
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…
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.