Before revision: Regional variants American West Setting polls propelling Lewis and Clark's keelboat on the back of the 2004 U.S. Nickel Setting poles were used widely on the rivers of the 18th and 19th century American West to propel keelboats.
After revision: Regional variants American West Setting poles propelling Lewis and Clark's keelboat on the back of the 2004 U.S. Nickel Setting poles were used widely on the rivers of the 18th and 19th century American West to propel keelboats.