Of the Philadelphia "wise men" whom Meriwether Lewis visited in 1803, perhaps none was more excited about Lewis' journey than Dr. Benjamin Smith Barton. In fact, Barton wanted to join the expedition...

When Meriwether Lewis needed to learn celestial observation to help map his journey, President Jefferson knew exactly where Lewis should go—to Andrew Ellicott...

He proposed and helped pay for the United States' first national road. He authored definitive studies on Native American culture and language. He helped map out the Lewis and Clark trip, and much more. Impressive stuff, yet history seems to overlook Albert Gallatin...

Long before Abe changed history, another Lincoln played a major role in U.S. politics, and the Lewis and Clark expedition...

Of all the expenses involved in outfitting the Lewis and Clark expedition, the most spent on a single item was paid to Philadelphia clockmaker...

Schooling Meriwether Lewis on the tricks of navigation, surveying, astronomy, and mathematics was more than one man could handle. That's where Robert Patterson came in...

Benjamin Rush no doubt was America's leading physician when Meriwether Lewis visited him; he had made his mark during in the American Revolution...

One man might have been busier during Meriwether Lewis' visit to Philadelphia than Lewis himself...

Did brass buttons help the Lewis and Clark expedition? Well, in a manner of speaking...