Look forward to seeing it.
Finding a Tennessee gun in Texas does not surprise me in the least - lots of Tennesseans went to Texas and in Jerry Noble's books there are lots of references to Tennessee gunsmiths, and Tennessee guns (including some famous Bull rifles) ending up in Texas. There is a letter from one of their relatives in Texas that describes the need for gunsmiths there and describes one of their "$35 rifles" and goes on to say that the owner could have sold it easily for $100 but would not sell it for any price.
We tend to think of these guns as being used mostly around where they were made, but you would probably have seen quite a mix of eastern longrifles in use west of the Mississippi prior to the Civil War. The westard movement of the younger, and next generation of - the eastern pioneers - people like the Sublettes (descendants of William Whitley), Nathan Boone, the Coles, Neil Washburn - is a really fascinating and overlooked part of our history, particularly with regard to longrifles. Many of the younger siblings, and children, of those who hunted buffalo and fought in Kentucky and Tennessee in the 1770s moved on west of the Mississippi and were doing the same thing in Missouri, Texas and beyond by the early 1800s. Lots of Natives probably brought guns west as well - keep in mind, the Cherokee were beginning to move westward into Arkansas and beyond by the late 1700s.