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On this day in Lewis & Clark history...

Lewis and Clark take the keelboat down the Ohio River on their way to Fort Massac, the largest military outpost in the west. Near this date, they pass or perhaps stay at the Anderson Ferry that operated near present Troy, Indiana.

From the journals...

Clover creek, same side,
Anderson's Ferry, left side

Zadok Cramer
Snippet from a book used by Meriwether Lewis to help navigate the Ohio River

Quotation and picture from The Navigator: Or, the Trader's Useful Guide in Navigating the Monongehela, Allegheny, Ohio and Mississippi Rivers by Zadok Cramer, Fifth Edition, published in 1806. Lewis used an earlier edition to help him navigate and describe the journey down the Ohio River.