|Relationships:||The Cahill Family|
|First Appears In:||N/A|
|Last Appears In:||N/A|
William Clark was a Tomas explorer who lived from August 1, 1770 to September 1, 1838. He was hired by Thomas Jefferson to explore the new land bought from France. He, along with Meriwether Lewis explored the land. His compass appears in Day of Doom.