On this day in Lewis & Clark history...
Below present Yankton, South Dakota, a prairie fire is set to invite the Sioux to council. Two Indian boys arrive, and a party is sent to find their Chiefs. Drouillard is unable to find Shannon who has not returned from hunting.
From the journals...
passed a Chalk Bluff on S. S. in the Same Bluff their is a vane of Black Sulpheras clay which has the appearance of Slate or Stone coal & Some kinds of mineral Substance
Missouri River near Niobrara
Painting by Karl Bodmer circa 1833.