On this day in Lewis & Clark history...
At sunrise, Lewis sets out down the Ohio River. They lift the keelboat over a few riffles and arrive at Marietta, Ohio. Lewis sees a large flock of passenger pigeons and writes a letter to President Jefferson.
From the journals...
observid many pigeons passing over us pursuing a south East course.
Passenger pigeons, Ectopistes migratorius
Painting by John James Audubon.
This morning being clare we persued our journey at sunrise and after passing a few riffles over which we had to lift the boat we arrived at Marietta, the mouth of the Muskingum river, at 7 OClock in the evening
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.