“With great trepidation, Buffon allowed that this last species [the American mastodon]- "the largest of them all" - seemed to have disappeared. It was, he proposed, the only land animal ever to have done so. ...

In 1781, Thomas Jefferson was drawn into the controvery.... [He believed] it was still out there somewhere. If it could not be found in Virginia, it was roaming those parts of the continent that "remain in their aboriginal stated, unexplored and undisturbed. When, as president, he dispatched Meriwether Lewis and William Clark to the Northwest, Jefferson hoped that they would come upon live [American mastodon] roaming its forests.”