Thanks you for the information. Our next step is to attempt to convince the Fredericksburg Range folks.
Joseph Tumlinson was also head of a DeWitt Co TX Militia unit during the 1861-65 war. "Capt Joseph Tumlinson's Mounted Minute Men"
I have a copy of the index card, but not the actual records for his unit.
Joseph's brother Peter also had a unit and his son Joseph served with his father.
We found Joseph's grave last year on his former land in DeWitt Co. TX. https://www.youtube.com/watch?v=4qlJsAn39nI