Who is Texan from Legends of the Fall and what is their importance?

The Texan appears in Revenge. He is described as a first rate horseman. who was once a rancher himself. Sadly, he squandered most his fortune when his wife left him. When we first meet the Texan, he is delivering a stud horse, dressed in fine clothes and speaking fluent Spanish. He only accepts payment for his work in cash, and he dies short;y after delivering the horse, something that provides Cochran with a large sum of money for his revenge and search for Miryea.