Moreton Frewen
Frewen moved to Wyoming.  He wanted to make northeastern Wyoming his own "kingdom."  With money from investors, he bought cattle.  He let his cattle graze on public lands.  He lived an extravagant life.  He built a mansion ("Frewen's castle") wherein he gave fancy parties for friends from England.  However, he did not know how to manage cattle and lost cattle, money and investors.  He also lost money in a mining company in Colorado.  He returned to England after his failures in America, where he had earned the nickname "Mortal Ruin."