Those earlier filibustering lads like Philip Nolan and Anthony Glass were trading for horses and mules from the Comanche circa 1795-1805. They were all heading west out of Natchitoches. Nolan had his connection to the traitorous Gen. James Wilkenson as he was Wilkenson’s secretary. ( Jane Long was Wilkenson’s niece. But that’s another story)
The comanches were the premiere horse and mule traders at that time, before their cattle raising days.
Glass ended up involved with the retrieval of the Texas Iron;
https://www.tshaonline.org/handbook/entries/texas-ironAnd Nolan ended up taking a spanish cannon ball in the face.
Fun times!!