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On this day in Lewis & Clark history...

To pass through a shallow spot on the Ohio River, Lewis has the crew cut a channel through the gravel. Lewis trades a few pounds of lead with a farmer for corn and potatoes. They camp about 9 miles upstream from Marietta, Ohio.

From the journals...

passed several bad riffles and one particularly at the lower end of the long reach called Willson's riffle here we were obliged to cut a channel through the gravel with our spade and canoe paddles and then drag the boat through

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

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.