26. Lewis and Clark 26. Lewis and Clark 26. Lewis and Clark 26. Lewis and Clark 26. Lewis and Clark http://www.ushistory.org/us/21b.asp 26. Lewis and Clark 26. Lewis and Clark 26. Lewis and Clark 26. Lewis and Clark 26. Lewis and Clark 26. Lewis and Clark 26. Lewis and Clark 26. Lewis and Clark 26. Lewis and Clark 26. Lewis and Clark 26. Lewis and Clark 26. Lewis and Clark 26. Lewis and Clark