Filibusters out of Louisiana (likes of Anthony Glass and Philip Nolan) were trading with the Comanches just the other side of the crosstimbers right after the turn of the 18th/19th century for horses and mules. Big damn trade going on right under the Spaniards noses. Not that our old pal Wilkenson had any pull in this escapade. But Nolan was at one time his “secretary” and the Spaniards did catch up with him.
Also during Col. Dodge’s First Dragoon expedition to the western Indian territory they were welcomed and camped with the Comanches. (Love that Catlin drawing of Dodge done on that expedition! With his round hat and hunting frock).
Here you go!