William Hales was born in Missouri and arrived in Oklahoma City in 1890 to be with his brother George. Together, they founded a mule and horse trade business which became very successful. They owned the largest horse barns on West Main Street. Hales, who was a very outgoing man and not afraid to show off his wealth, decided to build a home fit for his prominent status. The mansion has been well maintained by each owner and is in fine condition today.