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On this day in Lewis & Clark history...

Lewis and Clark spend the day at Fort Massac near present Metropolis, Illinois. Lewis attempts to make astronomical observations but must stop when evening clouds obscure the sky.

From the journals...

remained, took equal altitudes A. M. but was prevented from compleating the observation by taking an observation in the evening by the clouds—

Meriwether Lewis

Fort Massac on the Ohio

Historical sketch of the Ohio river at Fort Massac

Pencil on paper sketch by Karl Bodmer circa 1833.