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On this day in Lewis & Clark history...

Lewis and Clark are at the Great Falls of the Ohio at Louisville, Kentucky. During this period, the keelboat is piloted through the dangerous rapids and moored below the falls.

From the journals...

A pilot, who is regularly appointed by the court, can at all times be had here, to conduct you over falls.

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.