Not to burst your bubble but that air rifle did not go across the country with Lewis & Clark...Look at the video again, it is similiar to the ones that they took, but that is not one of them...
They both kept a diary which I have read several times, it's good reading if you enjoy history...
While I'm at it...William Clark learned how to deal with Indians from his older brother George Rogers Clark, whom Jefferson had wanted to lead a similiar expedition years before...
George Rogers Clark is one of the most fasinating and brave men in the early history of our Country...
And most have never heard of him.......