TexasHistory.com
Texas history.com: Butterfield Overland Mail in Texas
Looks at the history of the Overland Mail Company's Butterfield line, in honor of its 150th anniversary in 2008. It describes the tensions that existed in the territory that it crossed, between slave-owners, slaves, union supporters, and...
Utah Education Network
Uen: Utah History Encyclopedia: Pony Express in Utah
This resource provides concise historical information concerning the Pony Express in Utah.