PBS
Pbs the West: Charles Goodnight
Charles Goodnight (1836-1929) was one of the most prosperous cattleman of the American West. Read a thorough biography about him here at this site.
Ancestry
Ok Gen Web Project: The Chisholm Trail and the Overland Cattle Trade
Description of the establishment and use of the Chisholm Trail for cattle drives in the mid- to late-1800s.